diff --git a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
index 492e6d37ff07..b3f952e292a2 100644
--- a/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
+++ b/compiler/src/dotty/tools/dotc/core/SymDenotations.scala
@@ -782,7 +782,7 @@ object SymDenotations {
     }
 
     /** Is this a denotation of a class that does not have - either direct or inherited -
-     *  initaliazion code?
+     *  initialization code?
      */
     def isNoInitsClass(implicit ctx: Context): Boolean =
       isClass &&
diff --git a/docs/docs/reference/changed-features/structural-types.md b/docs/docs/reference/changed-features/structural-types.md
index de9d1c6bae6d..edd7adf6d333 100644
--- a/docs/docs/reference/changed-features/structural-types.md
+++ b/docs/docs/reference/changed-features/structural-types.md
@@ -70,7 +70,7 @@ differences.
   `Selectable` is a trait which declares the access operations.
 
 - Two access operations, `selectDynamic` and `applyDynamic` are shared
-  between both approches. In `Selectable`, `applyDynamic` also takes
+  between both approaches. In `Selectable`, `applyDynamic` also takes
   `ClassTag` indicating the method's formal parameter types. `Dynamic`
   comes with `updateDynamic`.
 
diff --git a/library/src/scala/Tuple.scala b/library/src/scala/Tuple.scala
index db983f55e835..3575dcb6c628 100644
--- a/library/src/scala/Tuple.scala
+++ b/library/src/scala/Tuple.scala
@@ -16,13 +16,13 @@ sealed trait Tuple extends Any {
     scala.runtime.Tuple.toIArray(this)
 
   /** Return a new tuple by prepending the element to `this` tuple.
-   *  This opteration is O(this.size)
+   *  This operation is O(this.size)
    */
   inline def *: [H, This >: this.type <: Tuple] (x: H): H *: This =
     scala.runtime.Tuple.cons(x, this).asInstanceOf[H *: This]
 
   /** Return a new tuple by concatenating `this` tuple with `that` tuple.
-   *  This opteration is O(this.size + that.size)
+   *  This operation is O(this.size + that.size)
    */
   inline def ++ [This >: this.type <: Tuple](that: Tuple): Concat[This, that.type] =
     scala.runtime.Tuple.concat(this, that).asInstanceOf[Concat[This, that.type]]
@@ -200,7 +200,7 @@ sealed trait NonEmptyTuple extends Tuple {
     scala.runtime.Tuple.apply(this, 0).asInstanceOf[Head[This]]
 
   /** Get the tail of this tuple.
-   *  This opteration is O(this.size)
+   *  This operation is O(this.size)
    */
   inline def tail[This >: this.type <: NonEmptyTuple]: Tail[This] =
     scala.runtime.Tuple.tail(this).asInstanceOf[Tail[This]]
diff --git a/tasty/src/dotty/tools/tasty/TastyFormat.scala b/tasty/src/dotty/tools/tasty/TastyFormat.scala
index f330254e4ff2..96ded6aa7df9 100644
--- a/tasty/src/dotty/tools/tasty/TastyFormat.scala
+++ b/tasty/src/dotty/tools/tasty/TastyFormat.scala
@@ -56,7 +56,7 @@ Standard-Section: "ASTs" TopLevelStat*
 
   Stat          = Term
                   ValOrDefDef
-                  TYPEDEF        Length NameRef (type_Term | Template) Modifier*   -- modifiers type name (= type | bounds)  |  moifiers class name template
+                  TYPEDEF        Length NameRef (type_Term | Template) Modifier*   -- modifiers type name (= type | bounds)  |  modifiers class name template
                   IMPORT         Length qual_Term Selector*                        -- import qual selectors
   ValOrDefDef   = VALDEF         Length NameRef type_Term rhs_Term? Modifier*      -- modifiers val name : type (= rhs)?
                   DEFDEF         Length NameRef TypeParam* Params* returnType_Term