diff --git a/lib/matplotlib/font_manager.py b/lib/matplotlib/font_manager.py
index 0a5588d13452..c38501f11d84 100644
--- a/lib/matplotlib/font_manager.py
+++ b/lib/matplotlib/font_manager.py
@@ -93,6 +93,12 @@
     'bold':       700,
     'heavy':      800,
     'extra bold': 800,
+    'extrabold':  800,
+    'superbold':  800,
+    'ultrabold':  800,
+    'ultrablack': 1000,
+    'superblack': 1000,
+    'extrablack': 1000,
     'black':      900,
 }
 _weight_regexes = [
diff --git a/lib/matplotlib/tests/test_font_manager.py b/lib/matplotlib/tests/test_font_manager.py
index 1b6e7b4778a1..1fddb74c60fd 100644
--- a/lib/matplotlib/tests/test_font_manager.py
+++ b/lib/matplotlib/tests/test_font_manager.py
@@ -427,6 +427,12 @@ def test_normalize_weights():
     assert _normalize_weight('bold') == 700
     assert _normalize_weight('heavy') == 800
     assert _normalize_weight('extra bold') == 800
+    assert _normalize_weight('extrabold') == 800
+    assert _normalize_weight('superbold') == 800
+    assert _normalize_weight('ultrabold') == 800
+    assert _normalize_weight('ultrablack') == 1000
+    assert _normalize_weight('superblack') == 1000
+    assert _normalize_weight('extrablack') == 1000
     assert _normalize_weight('black') == 900
     with pytest.raises(KeyError):
         _normalize_weight('invalid')