. "Vowel" . "close and open" . "oral" . "vowel heights" . "Vowel#Backness" . . . "lowering" . . "frontness" . "Retracted Tongue Root" . "nasal" . . "vocalic" . "vocalism" . "quality" . "oral vowel" . . . . "backness" . "lower" . "rounding" . . . "vowels" . "closed" . "open vowel" . "vowel sounds" . "close" . "vowel phonemes" . "vowel" . "Vowel#Systems" . "roundedness" . "Vowel height" . "voweles" . "Vowel" . "open and closed" . "vowel sound" . "vowel letter" . "vowel height" . "vowels" . "Vowel#Phonation" . "Vowel#Articulation" . "vowel#Written vowels" . "height" . "higher" . . "V" . "open" . "vowel backnesses" . "retracted tongue root" . "vowel systems" . "vocalic sound" . "Vowel#Acoustics" . "vowel quality." . "relatively high" . "devoiced" . "Vowel#Written vowels" . "front and back" . "three-vowel system" . "three phonemic vowels" . "raising" . "vowel system" . "High" . "creaky" . "vowel qualities" . "Low" . "Vocalic" . "vowel inventory" . "Heightening" . "more open" . "Vowel#Words without vowels" . . "Vowel#Height" .