Act
Act verb - To present a portrayal or performance of.
Fail is an antonym for act in topics: do something, entertain by playing a role, behave in a certain way.
Fail
Fail verb - To stop functioning.
Common collocations
Both words in one sentence
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When Ceylan throws a paper airplane at him when he's introducing himself, he doesn't fail to remark the cliched-ness of the act because he's new.
Source: Anime / Tenkai Knights - Johnny, your suicidal friend in Adolescence, also counts who can be saved if you act quickly, or successfully kill himself if you fail.
Source: Video Game / Alter Ego - Jerkass Façade: Sometimes if you pull off jerkish moves and either fail to act tough or follow up with a not-so-jerkish move, the narrator is convinced this is you.
Source: Video Game / Alter Ego
Cite this Source
Fail and Act. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/act/fail
Act & Fail. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/act/fail>.
Fail or Act. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/act/fail.
Google Ngram Viewer shows how "act" and "fail" have occurred on timeline