diff --git a/spec/ameba/config_spec.cr b/spec/ameba/config_spec.cr
index 86b111eb..c5f82631 100644
--- a/spec/ameba/config_spec.cr
+++ b/spec/ameba/config_spec.cr
@@ -127,7 +127,7 @@ module Ameba
         config.sources.any?(&.fullpath.==(__FILE__)).should be_true
       end
 
-      it "returns a list of sources mathing globs" do
+      it "returns a list of sources matching globs" do
         config.globs = %w(**/config_spec.cr)
         config.sources.size.should eq(1)
       end
diff --git a/spec/ameba/rule/lint/redundant_string_cercion_spec.cr b/spec/ameba/rule/lint/redundant_string_cercion_spec.cr
index cacb74e0..f60defe6 100644
--- a/spec/ameba/rule/lint/redundant_string_cercion_spec.cr
+++ b/spec/ameba/rule/lint/redundant_string_cercion_spec.cr
@@ -4,21 +4,21 @@ module Ameba::Rule::Lint
   describe RedundantStringCoercion do
     subject = RedundantStringCoercion.new
 
-    it "does not report if there is no redundant string coersion" do
+    it "does not report if there is no redundant string coercion" do
       s = Source.new %(
         "Hello, #{name}"
       )
       subject.catch(s).should be_valid
     end
 
-    it "reports if there is a redundant string coersion" do
+    it "reports if there is a redundant string coercion" do
       s = Source.new %q(
         "Hello, #{name.to_s}"
       )
       subject.catch(s).should_not be_valid
     end
 
-    it "does not report if coersion is used in binary op" do
+    it "does not report if coercion is used in binary op" do
       s = Source.new %q(
         "Hello, #{3.to_s + 's'}"
       )
diff --git a/spec/ameba/rule/lint/useless_assign_spec.cr b/spec/ameba/rule/lint/useless_assign_spec.cr
index 5b7e06ac..2f67281c 100644
--- a/spec/ameba/rule/lint/useless_assign_spec.cr
+++ b/spec/ameba/rule/lint/useless_assign_spec.cr
@@ -4,7 +4,7 @@ module Ameba::Rule::Lint
   describe UselessAssign do
     subject = UselessAssign.new
 
-    it "does not report used assigments" do
+    it "does not report used assignments" do
       s = Source.new %(
         def method
           a = 2
@@ -54,7 +54,7 @@ module Ameba::Rule::Lint
       subject.catch(s).should_not be_valid
     end
 
-    it "does not report ignored assigments" do
+    it "does not report ignored assignments" do
       s = Source.new %(
         payload, _header = decode
         puts payload
@@ -859,7 +859,7 @@ module Ameba::Rule::Lint
     end
 
     context "typeof" do
-      it "reports useless assigments in typeof" do
+      it "reports useless assignments in typeof" do
         s = Source.new %(
           typeof(begin
             foo = 1
@@ -944,7 +944,7 @@ module Ameba::Rule::Lint
         subject.catch(s).should be_valid
       end
 
-      it "doesn't report if assignement is referenced in for macro in exp" do
+      it "doesn't report if assignment is referenced in for macro in exp" do
         s = Source.new %(
           foo = 22
 
@@ -955,7 +955,7 @@ module Ameba::Rule::Lint
         subject.catch(s).should be_valid
       end
 
-      it "doesn't report if assignement is referenced in for macro in body" do
+      it "doesn't report if assignment is referenced in for macro in body" do
         s = Source.new %(
           foo = 22
 
@@ -966,7 +966,7 @@ module Ameba::Rule::Lint
         subject.catch(s).should be_valid
       end
 
-      it "doesn't report if assignement is referenced in if macro in cond" do
+      it "doesn't report if assignment is referenced in if macro in cond" do
         s = Source.new %(
           foo = 22
           {% if "foo".id %}
@@ -975,7 +975,7 @@ module Ameba::Rule::Lint
         subject.catch(s).should be_valid
       end
 
-      it "doesn't report if assignement is referenced in if macro in then" do
+      it "doesn't report if assignment is referenced in if macro in then" do
         s = Source.new %(
           foo = 22
           {% if true %}
@@ -985,7 +985,7 @@ module Ameba::Rule::Lint
         subject.catch(s).should be_valid
       end
 
-      it "doesn't report if assignement is referenced in if macro in else" do
+      it "doesn't report if assignment is referenced in if macro in else" do
         s = Source.new %(
           foo = 22
           {% if true %}
diff --git a/spec/ameba/rule/style/redundant_next_spec.cr b/spec/ameba/rule/style/redundant_next_spec.cr
index 689894d1..47fcec2d 100644
--- a/spec/ameba/rule/style/redundant_next_spec.cr
+++ b/spec/ameba/rule/style/redundant_next_spec.cr
@@ -146,7 +146,7 @@ module Ameba::Rule::Style
       end
     end
 
-    context "expception handler" do
+    context "exception handler" do
       it "doesn't report if there is no redundant next in exception handler" do
         expect_no_issues subject, <<-CRYSTAL
           block do |v|
diff --git a/spec/ameba/severity_spec.cr b/spec/ameba/severity_spec.cr
index cf63c133..633372b0 100644
--- a/spec/ameba/severity_spec.cr
+++ b/spec/ameba/severity_spec.cr
@@ -41,7 +41,7 @@ module Ameba
     end
   end
 
-  struct SeverityConvertable
+  struct SeverityConvertible
     include YAML::Serializable
 
     @[YAML::Field(converter: Ameba::SeverityYamlConverter)]
@@ -52,33 +52,33 @@ module Ameba
     describe ".from_yaml" do
       it "converts from yaml to Severity::Error" do
         yaml = {severity: "error"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml)
+        converted = SeverityConvertible.from_yaml(yaml)
         converted.severity.should eq Severity::Error
       end
 
       it "converts from yaml to Severity::Warning" do
         yaml = {severity: "warning"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml)
+        converted = SeverityConvertible.from_yaml(yaml)
         converted.severity.should eq Severity::Warning
       end
 
       it "converts from yaml to Severity::Convention" do
         yaml = {severity: "convention"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml)
+        converted = SeverityConvertible.from_yaml(yaml)
         converted.severity.should eq Severity::Convention
       end
 
       it "raises if severity is not a scalar" do
         yaml = {severity: {convention: true}}.to_yaml
         expect_raises(Exception, "Severity must be a scalar") do
-          SeverityConvertable.from_yaml(yaml)
+          SeverityConvertible.from_yaml(yaml)
         end
       end
 
       it "raises if severity has a wrong type" do
         yaml = {severity: [1, 2, 3]}.to_yaml
         expect_raises(Exception, "Severity must be a scalar") do
-          SeverityConvertable.from_yaml(yaml)
+          SeverityConvertible.from_yaml(yaml)
         end
       end
     end
@@ -86,19 +86,19 @@ module Ameba
     describe ".to_yaml" do
       it "converts Severity::Error to yaml" do
         yaml = {severity: "error"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml).to_yaml
+        converted = SeverityConvertible.from_yaml(yaml).to_yaml
         converted.should eq "---\nseverity: Error\n"
       end
 
       it "converts Severity::Warning to yaml" do
         yaml = {severity: "warning"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml).to_yaml
+        converted = SeverityConvertible.from_yaml(yaml).to_yaml
         converted.should eq "---\nseverity: Warning\n"
       end
 
       it "converts Severity::Convention to yaml" do
         yaml = {severity: "convention"}.to_yaml
-        converted = SeverityConvertable.from_yaml(yaml).to_yaml
+        converted = SeverityConvertible.from_yaml(yaml).to_yaml
         converted.should eq "---\nseverity: Convention\n"
       end
     end
diff --git a/src/ameba/ast/scope.cr b/src/ameba/ast/scope.cr
index 4a114930..34be5b59 100644
--- a/src/ameba/ast/scope.cr
+++ b/src/ameba/ast/scope.cr
@@ -117,7 +117,7 @@ module Ameba::AST
         !!outer_scope.try(&.in_macro?)
     end
 
-    # Returns `true` if instance variable is assinged in this scope.
+    # Returns `true` if instance variable is assigned in this scope.
     def assigns_ivar?(name)
       arguments.find(&.name.== name) &&
         ivariables.find(&.name.== "@#{name}")
diff --git a/src/ameba/rule/lint/shared_var_in_fiber.cr b/src/ameba/rule/lint/shared_var_in_fiber.cr
index 69bb8b38..2a2bd16e 100644
--- a/src/ameba/rule/lint/shared_var_in_fiber.cr
+++ b/src/ameba/rule/lint/shared_var_in_fiber.cr
@@ -40,7 +40,7 @@ module Ameba::Rule::Lint
   # during iterations. So it reports the issue on the first sample and passes on
   # the second one.
   #
-  # There are also other technics to solve the problem above which are
+  # There are also other techniques to solve the problem above which are
   # [officially documented](https://crystal-lang.org/reference/guides/concurrency.html)
   #
   # YAML configuration example:
diff --git a/src/ameba/rule/style/negated_conditions_in_unless.cr b/src/ameba/rule/style/negated_conditions_in_unless.cr
index 653a574b..62e477f7 100644
--- a/src/ameba/rule/style/negated_conditions_in_unless.cr
+++ b/src/ameba/rule/style/negated_conditions_in_unless.cr
@@ -12,7 +12,7 @@ module Ameba::Rule::Style
   # And should be rewritten to the following:
   #
   # ```
-  # if s.emtpy?
+  # if s.empty?
   #   :ok
   # end
   # ```
diff --git a/src/ameba/rule/style/redundant_return.cr b/src/ameba/rule/style/redundant_return.cr
index 329fab76..7a020073 100644
--- a/src/ameba/rule/style/redundant_return.cr
+++ b/src/ameba/rule/style/redundant_return.cr
@@ -90,7 +90,7 @@ module Ameba::Rule::Style
   # ```
   # Style/RedundantReturn:
   #   Enabled: true
-  #   AllowMutliReturn: true
+  #   AllowMultiReturn: true
   #   AllowEmptyReturn: true
   # ```
   class RedundantReturn < Base