diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 4e630203b8631..e67c96265274b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -2028,6 +2028,10 @@ namespace ts {
                         let suggestion: Symbol | undefined;
                         if (suggestedNameNotFoundMessage && suggestionCount < maximumSuggestionCount) {
                             suggestion = getSuggestedSymbolForNonexistentSymbol(originalLocation, name, meaning);
+                            const isGlobalScopeAugmentationDeclaration = suggestion && suggestion.valueDeclaration && isAmbientModule(suggestion.valueDeclaration) && isGlobalScopeAugmentation(suggestion.valueDeclaration);
+                            if (isGlobalScopeAugmentationDeclaration) {
+                                suggestion = undefined;
+                            }
                             if (suggestion) {
                                 const suggestionName = symbolToString(suggestion);
                                 const diagnostic = error(errorLocation, suggestedNameNotFoundMessage, diagnosticName(nameArg!), suggestionName);
diff --git a/tests/baselines/reference/spellingSuggestionGlobal1.errors.txt b/tests/baselines/reference/spellingSuggestionGlobal1.errors.txt
new file mode 100644
index 0000000000000..491623ea37bf9
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal1.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/compiler/spellingSuggestionGlobal1.ts(3,1): error TS2304: Cannot find name 'global'.
+
+
+==== tests/cases/compiler/spellingSuggestionGlobal1.ts (1 errors) ====
+    export {}
+    declare global { const x: any }
+    global.x // should not suggest `global` (GH#42209)
+    ~~~~~~
+!!! error TS2304: Cannot find name 'global'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/spellingSuggestionGlobal1.js b/tests/baselines/reference/spellingSuggestionGlobal1.js
new file mode 100644
index 0000000000000..16d5da7ba8128
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal1.js
@@ -0,0 +1,10 @@
+//// [spellingSuggestionGlobal1.ts]
+export {}
+declare global { const x: any }
+global.x // should not suggest `global` (GH#42209)
+
+
+//// [spellingSuggestionGlobal1.js]
+"use strict";
+exports.__esModule = true;
+global.x; // should not suggest `global` (GH#42209)
diff --git a/tests/baselines/reference/spellingSuggestionGlobal1.symbols b/tests/baselines/reference/spellingSuggestionGlobal1.symbols
new file mode 100644
index 0000000000000..e9d20fe53d7db
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal1.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/spellingSuggestionGlobal1.ts ===
+export {}
+declare global { const x: any }
+>global : Symbol(global, Decl(spellingSuggestionGlobal1.ts, 0, 9))
+>x : Symbol(x, Decl(spellingSuggestionGlobal1.ts, 1, 22))
+
+global.x // should not suggest `global` (GH#42209)
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal1.types b/tests/baselines/reference/spellingSuggestionGlobal1.types
new file mode 100644
index 0000000000000..1c4cd6a79e264
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal1.types
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/spellingSuggestionGlobal1.ts ===
+export {}
+declare global { const x: any }
+>global : typeof global
+>x : any
+
+global.x // should not suggest `global` (GH#42209)
+>global.x : any
+>global : any
+>x : any
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal2.errors.txt b/tests/baselines/reference/spellingSuggestionGlobal2.errors.txt
new file mode 100644
index 0000000000000..813e64867f019
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal2.errors.txt
@@ -0,0 +1,12 @@
+tests/cases/compiler/spellingSuggestionGlobal2.ts(4,1): error TS2552: Cannot find name 'global'. Did you mean 'globals'?
+
+
+==== tests/cases/compiler/spellingSuggestionGlobal2.ts (1 errors) ====
+    export {}
+    declare global { const x: any }
+    const globals = { x: true }
+    global.x // should suggest `globals` (GH#42209)
+    ~~~~~~
+!!! error TS2552: Cannot find name 'global'. Did you mean 'globals'?
+!!! related TS2728 tests/cases/compiler/spellingSuggestionGlobal2.ts:3:7: 'globals' is declared here.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/spellingSuggestionGlobal2.js b/tests/baselines/reference/spellingSuggestionGlobal2.js
new file mode 100644
index 0000000000000..b7da56d7f494b
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal2.js
@@ -0,0 +1,12 @@
+//// [spellingSuggestionGlobal2.ts]
+export {}
+declare global { const x: any }
+const globals = { x: true }
+global.x // should suggest `globals` (GH#42209)
+
+
+//// [spellingSuggestionGlobal2.js]
+"use strict";
+exports.__esModule = true;
+var globals = { x: true };
+global.x; // should suggest `globals` (GH#42209)
diff --git a/tests/baselines/reference/spellingSuggestionGlobal2.symbols b/tests/baselines/reference/spellingSuggestionGlobal2.symbols
new file mode 100644
index 0000000000000..e7cd40a83f946
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal2.symbols
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/spellingSuggestionGlobal2.ts ===
+export {}
+declare global { const x: any }
+>global : Symbol(global, Decl(spellingSuggestionGlobal2.ts, 0, 9))
+>x : Symbol(x, Decl(spellingSuggestionGlobal2.ts, 1, 22))
+
+const globals = { x: true }
+>globals : Symbol(globals, Decl(spellingSuggestionGlobal2.ts, 2, 5))
+>x : Symbol(x, Decl(spellingSuggestionGlobal2.ts, 2, 17))
+
+global.x // should suggest `globals` (GH#42209)
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal2.types b/tests/baselines/reference/spellingSuggestionGlobal2.types
new file mode 100644
index 0000000000000..07463a102285c
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal2.types
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/spellingSuggestionGlobal2.ts ===
+export {}
+declare global { const x: any }
+>global : typeof global
+>x : any
+
+const globals = { x: true }
+>globals : { x: boolean; }
+>{ x: true } : { x: boolean; }
+>x : boolean
+>true : true
+
+global.x // should suggest `globals` (GH#42209)
+>global.x : any
+>global : any
+>x : any
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal3.errors.txt b/tests/baselines/reference/spellingSuggestionGlobal3.errors.txt
new file mode 100644
index 0000000000000..a3d49611fbfdf
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal3.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/compiler/spellingSuggestionGlobal3.ts(2,1): error TS2552: Cannot find name 'globals'. Did you mean 'global'?
+
+
+==== tests/cases/compiler/spellingSuggestionGlobal3.ts (1 errors) ====
+    const global = { x: true }
+    globals.x // should suggest `global` (GH#42209)
+    ~~~~~~~
+!!! error TS2552: Cannot find name 'globals'. Did you mean 'global'?
+!!! related TS2728 tests/cases/compiler/spellingSuggestionGlobal3.ts:1:7: 'global' is declared here.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/spellingSuggestionGlobal3.js b/tests/baselines/reference/spellingSuggestionGlobal3.js
new file mode 100644
index 0000000000000..9ce2c0d55298d
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal3.js
@@ -0,0 +1,8 @@
+//// [spellingSuggestionGlobal3.ts]
+const global = { x: true }
+globals.x // should suggest `global` (GH#42209)
+
+
+//// [spellingSuggestionGlobal3.js]
+var global = { x: true };
+globals.x; // should suggest `global` (GH#42209)
diff --git a/tests/baselines/reference/spellingSuggestionGlobal3.symbols b/tests/baselines/reference/spellingSuggestionGlobal3.symbols
new file mode 100644
index 0000000000000..44a64fd50f01f
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal3.symbols
@@ -0,0 +1,7 @@
+=== tests/cases/compiler/spellingSuggestionGlobal3.ts ===
+const global = { x: true }
+>global : Symbol(global, Decl(spellingSuggestionGlobal3.ts, 0, 5))
+>x : Symbol(x, Decl(spellingSuggestionGlobal3.ts, 0, 16))
+
+globals.x // should suggest `global` (GH#42209)
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal3.types b/tests/baselines/reference/spellingSuggestionGlobal3.types
new file mode 100644
index 0000000000000..d5708befef7a8
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal3.types
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/spellingSuggestionGlobal3.ts ===
+const global = { x: true }
+>global : { x: boolean; }
+>{ x: true } : { x: boolean; }
+>x : boolean
+>true : true
+
+globals.x // should suggest `global` (GH#42209)
+>globals.x : any
+>globals : any
+>x : any
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal4.errors.txt b/tests/baselines/reference/spellingSuggestionGlobal4.errors.txt
new file mode 100644
index 0000000000000..0e3a0853a479e
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal4.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/compiler/spellingSuggestionGlobal4.ts(3,1): error TS2304: Cannot find name 'global'.
+
+
+==== tests/cases/compiler/spellingSuggestionGlobal4.ts (1 errors) ====
+    export {}
+    declare global { var x: any }
+    global.x // should not suggest `global` (GH#42209)
+    ~~~~~~
+!!! error TS2304: Cannot find name 'global'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/spellingSuggestionGlobal4.js b/tests/baselines/reference/spellingSuggestionGlobal4.js
new file mode 100644
index 0000000000000..d9e6c2b9a7c3c
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal4.js
@@ -0,0 +1,10 @@
+//// [spellingSuggestionGlobal4.ts]
+export {}
+declare global { var x: any }
+global.x // should not suggest `global` (GH#42209)
+
+
+//// [spellingSuggestionGlobal4.js]
+"use strict";
+exports.__esModule = true;
+global.x; // should not suggest `global` (GH#42209)
diff --git a/tests/baselines/reference/spellingSuggestionGlobal4.symbols b/tests/baselines/reference/spellingSuggestionGlobal4.symbols
new file mode 100644
index 0000000000000..862216dbdb19b
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal4.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/spellingSuggestionGlobal4.ts ===
+export {}
+declare global { var x: any }
+>global : Symbol(global, Decl(spellingSuggestionGlobal4.ts, 0, 9))
+>x : Symbol(x, Decl(spellingSuggestionGlobal4.ts, 1, 20))
+
+global.x // should not suggest `global` (GH#42209)
+
diff --git a/tests/baselines/reference/spellingSuggestionGlobal4.types b/tests/baselines/reference/spellingSuggestionGlobal4.types
new file mode 100644
index 0000000000000..9fd8b3367164c
--- /dev/null
+++ b/tests/baselines/reference/spellingSuggestionGlobal4.types
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/spellingSuggestionGlobal4.ts ===
+export {}
+declare global { var x: any }
+>global : typeof global
+>x : any
+
+global.x // should not suggest `global` (GH#42209)
+>global.x : any
+>global : any
+>x : any
+
diff --git a/tests/cases/compiler/spellingSuggestionGlobal1.ts b/tests/cases/compiler/spellingSuggestionGlobal1.ts
new file mode 100644
index 0000000000000..74e534da54dfe
--- /dev/null
+++ b/tests/cases/compiler/spellingSuggestionGlobal1.ts
@@ -0,0 +1,3 @@
+export {}
+declare global { const x: any }
+global.x // should not suggest `global` (GH#42209)
diff --git a/tests/cases/compiler/spellingSuggestionGlobal2.ts b/tests/cases/compiler/spellingSuggestionGlobal2.ts
new file mode 100644
index 0000000000000..5914f9990b30a
--- /dev/null
+++ b/tests/cases/compiler/spellingSuggestionGlobal2.ts
@@ -0,0 +1,4 @@
+export {}
+declare global { const x: any }
+const globals = { x: true }
+global.x // should suggest `globals` (GH#42209)
diff --git a/tests/cases/compiler/spellingSuggestionGlobal3.ts b/tests/cases/compiler/spellingSuggestionGlobal3.ts
new file mode 100644
index 0000000000000..853290a8d0210
--- /dev/null
+++ b/tests/cases/compiler/spellingSuggestionGlobal3.ts
@@ -0,0 +1,2 @@
+const global = { x: true }
+globals.x // should suggest `global` (GH#42209)
diff --git a/tests/cases/compiler/spellingSuggestionGlobal4.ts b/tests/cases/compiler/spellingSuggestionGlobal4.ts
new file mode 100644
index 0000000000000..a100ca4653b8a
--- /dev/null
+++ b/tests/cases/compiler/spellingSuggestionGlobal4.ts
@@ -0,0 +1,3 @@
+export {}
+declare global { var x: any }
+global.x // should not suggest `global` (GH#42209)