Antonyms of noun vowel

1 of 2 senses of vowel

Sense 1
vowel, vowel sound -- (a speech sound made with the vocal tract open)
       Antonym of consonant (Sense 1)
      => consonant -- (a speech sound that is not a vowel)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun vowel

2 senses of vowel

Sense 1
vowel, vowel sound -- (a speech sound made with the vocal tract open)
       => phone, speech sound, sound -- ((phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language)

Sense 2
vowel -- (a letter of the alphabet standing for a spoken vowel)
       => letter, letter of the alphabet, alphabetic character -- (the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters")