Synonyms|87Antonyms|1|Broader|0Narrower|0Related|21
2
soon(now, directly, immediately, rapidly, instantly)
2
straight(adverb, directly, immediately)
2
straight off(expression, adverb, directly, immediately, quickly)
2
summarily(directly, immediately, rapidly, instantly)
2
swiftly
2
thereupon(directly, immediately, rapidly, instantly)
2
tout de suite(expression, adverb, directly, immediately, rapidly)
2
unhesitatingly(adverb, directly, immediately, rapidly, instantly)
1
at short notice(expression, idiom, directly, rapidly, instantly)
1
contiguously
1
double-time(directly, immediately, rapidly, instantly, shortly)
1
in a New York minute(expression, idiom, directly, rapidly, instantly)
1
instant
1
like a shot
1
like lightning
1
now or never(expression, idiom, directly, rapidly, instantly)
1
nowadays
1
presto
1
soon afterward(expression, directly, immediately, rapidly, instantly)
1
straightway
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APASmart Define. (2015). instanter thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/instanter/thesaurus/synonyms
ChicagoSmart Define. 2015. "instanter thesaurus" https://smartdefine.org/instanter/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, instanter thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/instanter/thesaurus/synonyms>.
MLASmart Define. "instanter thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/instanter/thesaurus/synonyms>