docs(README): improve vocabulary and orthography

Closes #15876
Closes #15875

Author: atul-shimpi

README.md

@@ -8,8 +8,8 @@ synchronizes data from your UI (view) with your JavaScript objects (model) throu
 binding. To help you structure your application better and make it easy to test, AngularJS teaches
 the browser how to do dependency injection and inversion of control.
 
-It also helps with server-side communication, taming async callbacks with promises and deferreds,
-and it makes client-side navigation and deeplinking with hashbang urls or HTML5 pushState a
+It also helps with server-side communication, taming async callbacks with promises and deferred objects,
+and it makes client-side navigation and deep linking with hashbang urls or HTML5 pushState a
 piece of cake. Best of all? It makes development fun!
 
 * Web site: https://angularjs.org