diff --git a/lib/thor/actions.rb b/lib/thor/actions.rb
index d55b77b80..7e574d8bd 100644
--- a/lib/thor/actions.rb
+++ b/lib/thor/actions.rb
@@ -227,7 +227,7 @@ def apply(path, config={})
     # ==== Parameters
     # command<String>:: the command to be executed.
     # config<Hash>:: give :verbose => false to not log the status, :capture => true to hide to output. Specify :with
-    #                to append an executable to command executation.
+    #                to append an executable to command execution.
     #
     # ==== Example
     #
diff --git a/lib/thor/runner.rb b/lib/thor/runner.rb
index e51ceb5ce..bef3d57bc 100644
--- a/lib/thor/runner.rb
+++ b/lib/thor/runner.rb
@@ -206,7 +206,7 @@ def self.exit_on_failure?
     # in the thor_root instead of loading them all.
     #
     # By default, it also traverses the current path until find Thor files, as
-    # described in thorfiles. This look up can be skipped by suppliying
+    # described in thorfiles. This look up can be skipped by supplying
     # skip_lookup true.
     #
     def initialize_thorfiles(relevant_to=nil, skip_lookup=false)
diff --git a/spec/actions/create_file_spec.rb b/spec/actions/create_file_spec.rb
index 2586704dd..f63fb4ff5 100644
--- a/spec/actions/create_file_spec.rb
+++ b/spec/actions/create_file_spec.rb
@@ -101,7 +101,7 @@ def silence!
           expect(invoke!).to eq("        skip  doc/config.rb\n")
         end
 
-        it "shows conflict status to ther user" do
+        it "shows conflict status to the user" do
           expect(create_file("doc/config.rb")).not_to be_identical
           $stdin.should_receive(:gets).and_return('s')
           file = File.join(destination_root, 'doc/config.rb')
diff --git a/spec/actions/file_manipulation_spec.rb b/spec/actions/file_manipulation_spec.rb
index c4d571c4b..27f8775f9 100644
--- a/spec/actions/file_manipulation_spec.rb
+++ b/spec/actions/file_manipulation_spec.rb
@@ -177,7 +177,7 @@ def file
       expect(File.exists?(file)).to be_true
     end
 
-    it "converts enconded instructions" do
+    it "converts encoded instructions" do
       runner.should_receive(:file_name).and_return("rdoc")
       action :template, "doc/%file_name%.rb.tt"
       file = File.join(destination_root, "doc/rdoc.rb")
diff --git a/spec/actions/inject_into_file_spec.rb b/spec/actions/inject_into_file_spec.rb
index cf577deef..8b43f1b48 100644
--- a/spec/actions/inject_into_file_spec.rb
+++ b/spec/actions/inject_into_file_spec.rb
@@ -113,7 +113,7 @@ def file
       expect(File.read(file)).to eq("another stuff\n__start__\nREADME\n__end__\n")
     end
 
-    it "substracts when prepending" do
+    it "subtracts when prepending" do
       invoke! "doc/README", "more content\n", :after => /\A/
       invoke! "doc/README", "another stuff\n", :after => /\A/
       revoke! "doc/README", "more content\n", :after => /\A/
diff --git a/spec/actions_spec.rb b/spec/actions_spec.rb
index fc452c64f..f456bcc18 100644
--- a/spec/actions_spec.rb
+++ b/spec/actions_spec.rb
@@ -86,7 +86,7 @@ def file
         expect(runner.relative_to_original_destination_root('/test/file')).to eq("/test/file")
       end
 
-      it "does not fail with files constaining regexp characters" do
+      it "does not fail with files containing regexp characters" do
         runner = MyCounter.new([1], {}, { :destination_root => File.join(destination_root, "fo[o-b]ar") })
         expect(runner.relative_to_original_destination_root("bar")).to eq("bar")
       end
diff --git a/spec/core_ext/hash_with_indifferent_access_spec.rb b/spec/core_ext/hash_with_indifferent_access_spec.rb
index 5d6695102..dfa5721cf 100644
--- a/spec/core_ext/hash_with_indifferent_access_spec.rb
+++ b/spec/core_ext/hash_with_indifferent_access_spec.rb
@@ -20,7 +20,7 @@
     expect(@hash.nothing?).to be_false
   end
 
-  it "handles magic comparisions" do
+  it "handles magic comparisons" do
     expect(@hash.foo?('bar')).to be_true
     expect(@hash.foo?('bee')).to be_false
   end
diff --git a/spec/runner_spec.rb b/spec/runner_spec.rb
index 17fd29f83..d917cf2f3 100644
--- a/spec/runner_spec.rb
+++ b/spec/runner_spec.rb
@@ -69,7 +69,7 @@ def when_no_thorfiles_exist
       expect(Thor::Runner.start).to eq("default command")
     end
 
-    it "forwads arguments to the invoked command" do
+    it "forwards arguments to the invoked command" do
       ARGV.replace ["my_script:animal", "horse"]
       expect(Thor::Runner.start).to eq(["horse"])
     end