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

1 sense of sibilant

Sense 1
sibilant, sibilant consonant -- (a consonant characterized by a hissing sound (like s or sh))
       => fricative consonant, fricative, spirant -- (a continuant consonant produced by breath moving against a narrowing of the vocal tract)

Antonyms of adj sibilant

1 sense of sibilant

Sense 1
fricative, continuant, sibilant, spirant, strident -- (of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then'))

INDIRECT (VIA soft) -> hard -- ((of speech sounds); produced with the back of the tongue raised toward or touching the velum; "Russian distinguished between hard consonants and palatalized or soft consonants")

Similarity of adj sibilant

1 sense of sibilant

Sense 1
fricative, continuant, sibilant, spirant, strident -- (of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then'))
       => soft (vs. hard) -- ((of speech sounds); produced with the back of the tongue raised toward the hard palate; characterized by a hissing or hushing sound (as `s' and `sh'))