Word Type

Adjective

Adjective

The word "questionable" can be used as adjective and adjective.

Word Relationships

Opposites (Antonyms)

unquestionable

Derived Terms

questionability questionableness questionably unquestionability unquestionable unquestionableness unquestionably

Derived From

question

Related Terms

challenge contestable doubt dubious morality problematic question respectability

Similar Terms

alleged apocryphal apocryphal contestable debatable deniable doubtful dubious dubitable equivocal equivocal fishy funny impugnable impugnable in question in question problematic problematic problematical self styled self-styled shady so called so-called soi-disant supposed suspect suspicious suspicious

Synonym Network

confutative debatable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.