diff --git a/actionview/lib/action_view/helpers/asset_tag_helper.rb b/actionview/lib/action_view/helpers/asset_tag_helper.rb
index b1ba9da4cfe2f16b6bdee5a34ba67156becf1ed1..163d01c2eb5808fce0af4adfbb79f55a1112b3b7 100644
--- a/actionview/lib/action_view/helpers/asset_tag_helper.rb
+++ b/actionview/lib/action_view/helpers/asset_tag_helper.rb
@@ -103,7 +103,7 @@ def stylesheet_link_tag(*sources)
         }.join("\n").html_safe
       end
 
-      # Returns a link tag that browsers and news readers can use to auto-detect
+      # Returns a link tag that browsers and feed readers can use to auto-detect
       # an RSS or Atom feed. The +type+ can either be <tt>:rss</tt> (default) or
       # <tt>:atom</tt>. Control the link options in url_for format using the
       # +url_options+. You can modify the LINK tag itself in +tag_options+.
diff --git a/actionview/lib/action_view/helpers/form_options_helper.rb b/actionview/lib/action_view/helpers/form_options_helper.rb
index 4347983bad250508ac4e6f9762ff7daf46eff9ec..f625a9ff49f163e1401a8d869b46acc6ca0f0a77 100644
--- a/actionview/lib/action_view/helpers/form_options_helper.rb
+++ b/actionview/lib/action_view/helpers/form_options_helper.rb
@@ -260,7 +260,7 @@ def grouped_collection_select(object, method, collection, group_method, group_la
         Tags::GroupedCollectionSelect.new(object, method, self, collection, group_method, group_label_method, option_key_method, option_value_method, options, html_options).render
       end
 
-      # Return select and option tags for the given object and method, using
+      # Returns select and option tags for the given object and method, using
       # #time_zone_options_for_select to generate the list of option tags.
       #
       # In addition to the <tt>:include_blank</tt> option documented above,
diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb
index f336c759d2f09006dd32c0e049602d98c8787482..8d6d405e96528dc8fefbc0339986ce680900fcf2 100644
--- a/activemodel/lib/active_model/attribute_methods.rb
+++ b/activemodel/lib/active_model/attribute_methods.rb
@@ -349,7 +349,7 @@ def instance_method_already_implemented?(method_name) #:nodoc:
         # invoked often in a typical rails, both of which invoke the method
         # +match_attribute_method?+. The latter method iterates through an
         # array doing regular expression matches, which results in a lot of
-        # object creations. Most of the times it returns a +nil+ match. As the
+        # object creations. Most of the time it returns a +nil+ match. As the
         # match result is always the same given a +method_name+, this cache is
         # used to alleviate the GC, which ultimately also speeds up the app
         # significantly (in our case our test suite finishes 10% faster with
diff --git a/guides/source/2_2_release_notes.md b/guides/source/2_2_release_notes.md
index c11d1240c4ddf41798719d52403042243f91fdfb..522f628a7e53326a04d8bd03e52a3d8d186b2514 100644
--- a/guides/source/2_2_release_notes.md
+++ b/guides/source/2_2_release_notes.md
@@ -366,7 +366,7 @@ Lead Contributor: [Daniel Schierbeck](http://workingwithrails.com/person/5830-da
 * `Inflector#parameterize` produces a URL-ready version of its input, for use in `to_param`.
 * `Time#advance` recognizes fractional days and weeks, so you can do `1.7.weeks.ago`, `1.5.hours.since`, and so on.
 * The included TzInfo library has been upgraded to version 0.3.12.
-* `ActiveSuport::StringInquirer` gives you a pretty way to test for equality in strings: `ActiveSupport::StringInquirer.new("abc").abc? => true`
+* `ActiveSupport::StringInquirer` gives you a pretty way to test for equality in strings: `ActiveSupport::StringInquirer.new("abc").abc? => true`
 
 Railties
 --------
diff --git a/guides/source/action_view_overview.md b/guides/source/action_view_overview.md
index d4510735675ddaef924d41a23d2f9e5cce8e94b5..769be9840cd4a4ace81fdb5a5a2917f51fa8ec25 100644
--- a/guides/source/action_view_overview.md
+++ b/guides/source/action_view_overview.md
@@ -464,7 +464,7 @@ stylesheet_link_tag :monkey # =>
 
 #### auto_discovery_link_tag
 
-Returns a link tag that browsers and news readers can use to auto-detect an RSS or Atom feed.
+Returns a link tag that browsers and feed readers can use to auto-detect an RSS or Atom feed.
 
 ```ruby
 auto_discovery_link_tag(:rss, "http://www.example.com/feed.rss", {title: "RSS Feed"}) # =>
@@ -1143,7 +1143,7 @@ Returns a string of option tags for pretty much any country in the world.
 
 #### country_select
 
-Return select and option tags for the given object and method, using country_options_for_select to generate the list of option tags.
+Returns select and option tags for the given object and method, using country_options_for_select to generate the list of option tags.
 
 #### option_groups_from_collection_for_select
 
@@ -1242,7 +1242,7 @@ Returns a string of option tags for pretty much any time zone in the world.
 
 #### time_zone_select
 
-Return select and option tags for the given object and method, using `time_zone_options_for_select` to generate the list of option tags.
+Returns select and option tags for the given object and method, using `time_zone_options_for_select` to generate the list of option tags.
 
 ```ruby
 time_zone_select( "user", "time_zone")
@@ -1258,7 +1258,7 @@ date_field("user", "dob")
 
 ### FormTagHelper
 
-Provides a number of methods for creating form tags that doesn't rely on an Active Record object assigned to the template like FormHelper does. Instead, you provide the names and values manually.
+Provides a number of methods for creating form tags that don't rely on an Active Record object assigned to the template like FormHelper does. Instead, you provide the names and values manually.
 
 #### check_box_tag
 
diff --git a/guides/source/contributing_to_ruby_on_rails.md b/guides/source/contributing_to_ruby_on_rails.md
index a6956eb00951af0e363ab7f0530a907c03cc6380..814237ba22b74c62877a4ee4d98559e7bdf9bd91 100644
--- a/guides/source/contributing_to_ruby_on_rails.md
+++ b/guides/source/contributing_to_ruby_on_rails.md
@@ -55,7 +55,7 @@ can expect it to be marked "invalid" as soon as it's reviewed.
 
 Sometimes, the line between 'bug' and 'feature' is a hard one to draw.
 Generally, a feature is anything that adds new behavior, while a bug is
-anything that fixes already existing behavior that is mis-behaving. Sometimes,
+anything that fixes already existing behavior that is misbehaving. Sometimes,
 the core team will have to make a judgement call. That said, the distinction
 generally just affects which release your patch will get in to; we love feature
 submissions! They just won't get backported to maintenance branches.
diff --git a/guides/source/layouts_and_rendering.md b/guides/source/layouts_and_rendering.md
index c6a3449aceede5db47ebff5585cc1645a3d8640f..f4dab57aa5545f92219612e0d08fc2e76c046fe1 100644
--- a/guides/source/layouts_and_rendering.md
+++ b/guides/source/layouts_and_rendering.md
@@ -703,7 +703,7 @@ WARNING: The asset tag helpers do _not_ verify the existence of the assets at th
 
 #### Linking to Feeds with the `auto_discovery_link_tag`
 
-The `auto_discovery_link_tag` helper builds HTML that most browsers and newsreaders can use to detect the presence of RSS or Atom feeds. It takes the type of the link (`:rss` or `:atom`), a hash of options that are passed through to url_for, and a hash of options for the tag:
+The `auto_discovery_link_tag` helper builds HTML that most browsers and feed readers can use to detect the presence of RSS or Atom feeds. It takes the type of the link (`:rss` or `:atom`), a hash of options that are passed through to url_for, and a hash of options for the tag:
 
 ```erb
 <%= auto_discovery_link_tag(:rss, {action: "feed"},
diff --git a/railties/test/generators/plugin_generator_test.rb b/railties/test/generators/plugin_generator_test.rb
index c6b91e7cba0eb191d9757c22a05d09877637faca..7319a4e9d3d8b08347a29878dadfab405ac78fdf 100644
--- a/railties/test/generators/plugin_generator_test.rb
+++ b/railties/test/generators/plugin_generator_test.rb
@@ -309,7 +309,7 @@ def test_skipping_gemspec_in_full_mode
   end
 
   def test_creating_plugin_in_app_directory_adds_gemfile_entry
-    # simulate application existance
+    # simulate application existence
     gemfile_path = "#{Rails.root}/Gemfile"
     Object.const_set('APP_PATH', Rails.root)
     FileUtils.touch gemfile_path
@@ -323,7 +323,7 @@ def test_creating_plugin_in_app_directory_adds_gemfile_entry
   end
 
   def test_skipping_gemfile_entry
-    # simulate application existance
+    # simulate application existence
     gemfile_path = "#{Rails.root}/Gemfile"
     Object.const_set('APP_PATH', Rails.root)
     FileUtils.touch gemfile_path