VOWEL SYSTEMvowel system · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:VOWEL SYSTEMTier 1Ordinal178Pythagorean43Classical144Reverse119Reverse Reduction56Standard618Final Large1178Ordinal105Reduced42Atbash327Isopsephy2052Ordinal162Abjad694