Synonyms|519Antonyms|184|Broader|0Narrower|0Related|508
1
impulsive
1
in the know(expression, adjective, idiom, smooth, keen)
1
inebriant
1
inebriative
1
ingenious(adjective, smooth, keen, sharp, smart)
1
inside(sharp, smart, intelligent, clever, astute)
1
inspiriting
1
insubordinate
1
interesting(moving, stirring, inspiring, exhilarating, thrilling)
1
intoxicant
1
intoxicative
1
intractable(determined, fixed, stubborn)
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intriguing(moving, stirring, inspiring, exhilarating, thrilling)
1
iron
1
irresponsible
1
jarring
1
jolting
1
keen(adjective, smooth, sharp, smart, lively)
1
knitted
1
knowing(adjective, smooth, keen, sharp, smart)
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APASmart Define. (2015). heady thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/heady/thesaurus/synonyms
ChicagoSmart Define. 2015. "heady thesaurus" https://smartdefine.org/heady/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, heady thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/heady/thesaurus/synonyms>.
MLASmart Define. "heady thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/heady/thesaurus/synonyms>