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

1 sense of unmentionable

Sense 1
undergarment, unmentionable -- (a garment worn under other garments)
       => garment -- (an article of clothing; "garments of the finest silk")

Antonyms of adj unmentionable

1 sense of unmentionable

Sense 1
unmentionable -- (unsuitable or forbidden as a topic of conversation; "unmentionable words")

INDIRECT (VIA impermissible) -> permissible, allowable -- (that may be permitted especially as according to rule; "permissible behavior in school"; "a permissible tax deduction")

Similarity of adj unmentionable

1 sense of unmentionable

Sense 1
unmentionable -- (unsuitable or forbidden as a topic of conversation; "unmentionable words")
       => impermissible (vs. permissible) -- (not permitted; "impermissible behavior")