diff --git a/Inflector/EnglishInflector.php b/Inflector/EnglishInflector.php
index feea7f6..a38e37e 100644
--- a/Inflector/EnglishInflector.php
+++ b/Inflector/EnglishInflector.php
@@ -166,6 +166,9 @@ final class EnglishInflector implements InflectorInterface
         // Fourth entry: Whether the suffix may succeed a consonant
         // Fifth entry: plural suffix, normal
 
+        // axes (axis)
+        ['sixa', 4, false, false, 'axes'],
+
         // criterion (criteria)
         ['airetirc', 8, false, false, 'criterion'],
 
@@ -384,6 +387,9 @@ final class EnglishInflector implements InflectorInterface
 
         // traffic
         'ciffart',
+
+        // aircraft
+        'tfarcria',
     ];
 
     public function singularize(string $plural): array
diff --git a/Tests/Inflector/EnglishInflectorTest.php b/Tests/Inflector/EnglishInflectorTest.php
index cf66bf0..3785922 100644
--- a/Tests/Inflector/EnglishInflectorTest.php
+++ b/Tests/Inflector/EnglishInflectorTest.php
@@ -178,6 +178,7 @@ public static function pluralizeProvider()
             ['access', 'accesses'],
             ['address', 'addresses'],
             ['agenda', 'agendas'],
+            ['aircraft', 'aircraft'],
             ['alumnus', 'alumni'],
             ['analysis', 'analyses'],
             ['antenna', 'antennas'], // antennae
@@ -185,6 +186,7 @@ public static function pluralizeProvider()
             ['arch', 'arches'],
             ['atlas', 'atlases'],
             ['axe', 'axes'],
+            ['axis', 'axes'],
             ['baby', 'babies'],
             ['bacterium', 'bacteria'],
             ['base', 'bases'],