pose has 29 distinct synonyms spread across 8 of its 9 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
pretend to be someone you are not; sometimes with fraudulent intentions
“She posed as the Czar's daughter”
behave affectedly or unnaturally in order to impress others
“Don't pay any attention to him--he is always posing to impress his peers!”
affected manners intended to impress others
“don't put on airs with me”
a posture assumed by models for photographic or artistic purposes
Synonyms, antonyms and the broader and narrower relations for pose come from Princeton University’s WordNet. Full sources and licences.
a deliberate pretense or exaggerated display