diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs
index a3f046986c014..269811053a084 100644
--- a/compiler/rustc_ast_lowering/src/lib.rs
+++ b/compiler/rustc_ast_lowering/src/lib.rs
@@ -148,7 +148,7 @@ struct LoweringContext<'a, 'hir: 'a> {
     is_collecting_in_band_lifetimes: bool,
 
     /// Currently in-scope lifetimes defined in impl headers, fn headers, or HRTB.
-    /// When `is_collectin_in_band_lifetimes` is true, each lifetime is checked
+    /// When `is_collecting_in_band_lifetimes` is true, each lifetime is checked
     /// against this list to see if it is already in-scope, or if a definition
     /// needs to be created for it.
     ///
@@ -257,7 +257,7 @@ enum ImplTraitPosition {
     /// Disallowed in `let` / `const` / `static` bindings.
     Binding,
 
-    /// All other posiitons.
+    /// All other positions.
     Other,
 }
 
@@ -363,7 +363,7 @@ enum ParenthesizedGenericArgs {
 ///   elided bounds follow special rules. Note that this only covers
 ///   cases where *nothing* is written; the `'_` in `Box<dyn Foo +
 ///   '_>` is a case of "modern" elision.
-/// - **Deprecated** -- this coverse cases like `Ref<T>`, where the lifetime
+/// - **Deprecated** -- this covers cases like `Ref<T>`, where the lifetime
 ///   parameter to ref is completely elided. `Ref<'_, T>` would be the modern,
 ///   non-deprecated equivalent.
 ///
diff --git a/compiler/rustc_ast_passes/src/ast_validation.rs b/compiler/rustc_ast_passes/src/ast_validation.rs
index b1c8e0ee72730..d6585bcc4259b 100644
--- a/compiler/rustc_ast_passes/src/ast_validation.rs
+++ b/compiler/rustc_ast_passes/src/ast_validation.rs
@@ -516,7 +516,7 @@ impl<'a> AstValidator<'a> {
         self.session.source_map().guess_head_span(self.extern_mod.unwrap().span)
     }
 
-    /// An `fn` in `extern { ... }` cannot have qualfiers, e.g. `async fn`.
+    /// An `fn` in `extern { ... }` cannot have qualifiers, e.g. `async fn`.
     fn check_foreign_fn_headerless(&self, ident: Ident, span: Span, header: FnHeader) {
         if header.has_qualifiers() {
             self.err_handler()
diff --git a/compiler/rustc_data_structures/src/tagged_ptr.rs b/compiler/rustc_data_structures/src/tagged_ptr.rs
index e3839d193651d..cd1e12ca45016 100644
--- a/compiler/rustc_data_structures/src/tagged_ptr.rs
+++ b/compiler/rustc_data_structures/src/tagged_ptr.rs
@@ -24,7 +24,7 @@ mod drop;
 pub use copy::CopyTaggedPtr;
 pub use drop::TaggedPtr;
 
-/// This describes the pointer type encaspulated by TaggedPtr.
+/// This describes the pointer type encapsulated by TaggedPtr.
 ///
 /// # Safety
 ///
diff --git a/compiler/rustc_data_structures/src/transitive_relation.rs b/compiler/rustc_data_structures/src/transitive_relation.rs
index fe60a99dde072..2e1512b3929ca 100644
--- a/compiler/rustc_data_structures/src/transitive_relation.rs
+++ b/compiler/rustc_data_structures/src/transitive_relation.rs
@@ -18,7 +18,7 @@ pub struct TransitiveRelation<T: Eq + Hash> {
     edges: Vec<Edge>,
 
     // This is a cached transitive closure derived from the edges.
-    // Currently, we build it lazilly and just throw out any existing
+    // Currently, we build it lazily and just throw out any existing
     // copy whenever a new edge is added. (The Lock is to permit
     // the lazy computation.) This is kind of silly, except for the
     // fact its size is tied to `self.elements.len()`, so I wanted to
@@ -255,7 +255,7 @@ impl<T: Clone + Debug + Eq + Hash> TransitiveRelation<T> {
             // argument is that, after step 2, we know that no element
             // can reach its successors (in the vector, not the graph).
             // After step 3, we know that no element can reach any of
-            // its predecesssors (because of step 2) nor successors
+            // its predecessors (because of step 2) nor successors
             // (because we just called `pare_down`)
             //
             // This same algorithm is used in `parents` below.
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index b5155f8e910d7..08e9bdf308798 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -513,7 +513,7 @@ impl Emitter for SilentEmitter {
 /// Maximum number of lines we will print for a multiline suggestion; arbitrary.
 ///
 /// This should be replaced with a more involved mechanism to output multiline suggestions that
-/// more closely mimmics the regular diagnostic output, where irrelevant code lines are elided.
+/// more closely mimics the regular diagnostic output, where irrelevant code lines are elided.
 pub const MAX_SUGGESTION_HIGHLIGHT_LINES: usize = 6;
 /// Maximum number of suggestions to be shown
 ///
@@ -887,7 +887,7 @@ impl EmitterWriter {
                                                      // or the next are vertical line placeholders.
                         || (annotation.takes_space() // If either this or the next annotation is
                             && next.has_label())     // multiline start/end, move it to a new line
-                        || (annotation.has_label()   // so as not to overlap the orizontal lines.
+                        || (annotation.has_label()   // so as not to overlap the horizontal lines.
                             && next.takes_space())
                         || (annotation.takes_space() && next.takes_space())
                         || (overlaps(next, annotation, l)