diff --git a/RxSwift/ObserverType.swift b/RxSwift/ObserverType.swift
index 642f75fd..bb587c5e 100644
--- a/RxSwift/ObserverType.swift
+++ b/RxSwift/ObserverType.swift
@@ -26,12 +26,12 @@ public protocol ObserverType {
 }
 
 /**
-Convienence API extensions to provide alternate next, error, completed events
+Convenience API extensions to provide alternate next, error, completed events
 */
 public extension ObserverType {
     
     /**
-    Convienence method equivalent to `on(.Next(element: E))`
+    Convenience method equivalent to `on(.Next(element: E))`
     
     - parameter element: Next element to send to observer(s)
     */
@@ -40,14 +40,14 @@ public extension ObserverType {
     }
     
     /**
-    Convienence method equivalent to `on(.Completed)`
+    Convenience method equivalent to `on(.Completed)`
     */
     final func onCompleted() {
         on(.Completed)
     }
     
     /**
-    Convienence method equivalent to `on(.Error(error: ErrorType))`
+    Convenience method equivalent to `on(.Error(error: ErrorType))`
     - parameter error: ErrorType to send to observer(s)
     */
     final func onError(error: ErrorType) {