diff --git a/Library/Homebrew/cask/lib/hbc/artifact/relocated.rb b/Library/Homebrew/cask/lib/hbc/artifact/relocated.rb
index 4dba46c9d8..0e8e42c9be 100644
--- a/Library/Homebrew/cask/lib/hbc/artifact/relocated.rb
+++ b/Library/Homebrew/cask/lib/hbc/artifact/relocated.rb
@@ -34,7 +34,7 @@ module Hbc
         altnames.concat(%Q("#{altname}"))
         altnames = "(#{altnames})"
 
-        # Some packges are shipped as u=rx (e.g. Bitcoin Core)
+        # Some packages are shipped as u=rx (e.g. Bitcoin Core)
         @command.run!("/bin/chmod", args: ["--", "u+rw", file, file.realpath])
 
         @command.run!("/usr/bin/xattr",
diff --git a/Library/Homebrew/cask/lib/hbc/cli/internal_dump.rb b/Library/Homebrew/cask/lib/hbc/cli/internal_dump.rb
index e21ce86b6c..46273cbe3e 100644
--- a/Library/Homebrew/cask/lib/hbc/cli/internal_dump.rb
+++ b/Library/Homebrew/cask/lib/hbc/cli/internal_dump.rb
@@ -7,7 +7,7 @@ module Hbc
       end
 
       def run
-        raise CaskError, "Dump incomplete." if dump_casks == :incomplet
+        raise CaskError, "Dump incomplete." if dump_casks == :incomplete
       end
 
       def dump_casks
diff --git a/Library/Homebrew/compat/formula_specialties.rb b/Library/Homebrew/compat/formula_specialties.rb
index ec5e91ce8a..78966625ee 100644
--- a/Library/Homebrew/compat/formula_specialties.rb
+++ b/Library/Homebrew/compat/formula_specialties.rb
@@ -16,7 +16,7 @@ end
 # This formula serves as the base class for several very similar
 # formulae for Amazon Web Services related tools.
 class AmazonWebServicesFormula < Formula
-  # Use this method to peform a standard install for Java-based tools,
+  # Use this method to perform a standard install for Java-based tools,
   # keeping the .jars out of HOMEBREW_PREFIX/lib
   def install
     odeprecated "AmazonWebServicesFormula#install", "Formula#install"
diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index c6cb54f5da..daa5306faf 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -147,7 +147,7 @@ module HomebrewArgvExtension
     flag_with_value.strip_prefix(arg_prefix) if flag_with_value
   end
 
-  # Returns an array of values that were given as a comma-seperated list.
+  # Returns an array of values that were given as a comma-separated list.
   # @see value
   def values(name)
     return unless val = value(name)
diff --git a/Library/Homebrew/extend/string.rb b/Library/Homebrew/extend/string.rb
index ae7a209dbf..b96f129949 100644
--- a/Library/Homebrew/extend/string.rb
+++ b/Library/Homebrew/extend/string.rb
@@ -60,7 +60,7 @@ module StringInreplaceExtension
     result
   end
 
-  # Looks for Makefile style variable defintions and replaces the
+  # Looks for Makefile style variable definitions and replaces the
   # value with "new_value", or removes the definition entirely.
   def change_make_var!(flag, new_value)
     return if gsub!(/^#{Regexp.escape(flag)}[ \t]*=[ \t]*(.*)$/, "#{flag}=#{new_value}", false)
diff --git a/Library/Homebrew/os/mac.rb b/Library/Homebrew/os/mac.rb
index 5074665fca..bc75fc3223 100644
--- a/Library/Homebrew/os/mac.rb
+++ b/Library/Homebrew/os/mac.rb
@@ -129,8 +129,8 @@ module OS
         paths << path if path.exist?
       end
 
-      # Finally, some users make their MacPorts or Fink directorie
-      # read-only in order to try out Homebrew, but this doens't work as
+      # Finally, some users make their MacPorts or Fink directories
+      # read-only in order to try out Homebrew, but this doesn't work as
       # some build scripts error out when trying to read from these now
       # unreadable paths.
       %w[/sw /opt/local].map { |p| Pathname.new(p) }.each do |path|
diff --git a/Library/Homebrew/test/cask/depends_on_spec.rb b/Library/Homebrew/test/cask/depends_on_spec.rb
index c603cf6e14..fb92a9a24e 100644
--- a/Library/Homebrew/test/cask/depends_on_spec.rb
+++ b/Library/Homebrew/test/cask/depends_on_spec.rb
@@ -31,7 +31,7 @@ describe "Satisfy Dependencies and Requirements", :cask do
       it { is_expected.not_to raise_error }
     end
 
-    context "given a comparisson" do
+    context "given a comparison" do
       let(:cask) { Hbc::CaskLoader.load_from_file(TEST_FIXTURE_DIR/"cask/Casks/with-depends-on-macos-comparison.rb") }
       it { is_expected.not_to raise_error }
     end
diff --git a/Library/Homebrew/test/cmd/commands_spec.rb b/Library/Homebrew/test/cmd/commands_spec.rb
index cf6f567404..46ed3ddcfe 100644
--- a/Library/Homebrew/test/cmd/commands_spec.rb
+++ b/Library/Homebrew/test/cmd/commands_spec.rb
@@ -68,7 +68,7 @@ describe Homebrew do
 
       expect(cmds).to include("t1"), "Executable files should be included"
       expect(cmds).to include("t2"), "Executable Ruby files should be included"
-      expect(cmds).not_to include("t3"), "Executable files with a non Ruby extension shoudn't be included"
+      expect(cmds).not_to include("t3"), "Executable files with a non Ruby extension shouldn't be included"
       expect(cmds).not_to include("t4"), "Non-executable files shouldn't be included"
     end
   end
diff --git a/Library/Homebrew/test/dependency_expansion_spec.rb b/Library/Homebrew/test/dependency_expansion_spec.rb
index f955237a97..d6ecdf5527 100644
--- a/Library/Homebrew/test/dependency_expansion_spec.rb
+++ b/Library/Homebrew/test/dependency_expansion_spec.rb
@@ -69,7 +69,7 @@ describe Dependency do
     end
   end
 
-  it "merges dependencies and perserves env_proc" do
+  it "merges dependencies and preserves env_proc" do
     env_proc = double
     dep = described_class.new("foo", [], env_proc)
     allow(dep).to receive(:to_formula).and_return(double(deps: [], name: "foo"))
diff --git a/Library/Homebrew/test/pathname_spec.rb b/Library/Homebrew/test/pathname_spec.rb
index 0bc19c5acf..69314e5f49 100644
--- a/Library/Homebrew/test/pathname_spec.rb
+++ b/Library/Homebrew/test/pathname_spec.rb
@@ -295,7 +295,7 @@ describe FileUtils do
   let(:dst) { mktmpdir }
 
   describe "#mkdir" do
-    it "creates indermediate directories" do
+    it "creates intermediate directories" do
       described_class.mkdir dst/"foo/bar/baz" do
         expect(dst/"foo/bar/baz").to exist, "foo/bar/baz was not created"
         expect(dst/"foo/bar/baz").to be_a_directory, "foo/bar/baz was not a directory structure"
diff --git a/Library/Homebrew/test/requirement_spec.rb b/Library/Homebrew/test/requirement_spec.rb
index 71372aa69e..11a3da8f4e 100644
--- a/Library/Homebrew/test/requirement_spec.rb
+++ b/Library/Homebrew/test/requirement_spec.rb
@@ -48,7 +48,7 @@ describe Requirement do
       it { is_expected.to be_fatal }
     end
 
-    context "#fatal is ommitted" do
+    context "#fatal is omitted" do
       it { is_expected.not_to be_fatal }
     end
   end
@@ -184,7 +184,7 @@ describe Requirement do
       it { is_expected.to have_a_default_formula }
     end
 
-    context "#default_formula ommitted" do
+    context "#default_formula omitted" do
       it { is_expected.not_to have_a_default_formula }
     end
   end
diff --git a/Library/Homebrew/test/utils/github_spec.rb b/Library/Homebrew/test/utils/github_spec.rb
index 9322898eee..a132894f92 100644
--- a/Library/Homebrew/test/utils/github_spec.rb
+++ b/Library/Homebrew/test/utils/github_spec.rb
@@ -2,7 +2,7 @@ require "utils/github"
 
 describe GitHub do
   describe "::search_code", :needs_network do
-    it "queries GitHub code with the passed paramaters" do
+    it "queries GitHub code with the passed parameters" do
       results = subject.search_code(repo: "Homebrew/brew", path: "/",
                                     filename: "readme", language: "markdown")