1
dynamite(adjective, familiar, sophisticated, knowledgeable, skilled)
1
erudite(adjective, familiar, refined, knowledgeable, aware)
1
esoteric(adjective, sound, knowledgeable, cultured, educated)
1
expert(adjective, familiar, knowledgeable, qualified, cultured)
1
farsighted(adjective, smooth, keen, sharp, smart)
1
foxy(adjective, smooth, keen, sharp, smart)
1
go-go(adjective, alert, familiar, wise, knowledgeable)
1
grave(adjective, sound, knowledgeable, cultured, educated)
1
groovy(adjective, cool, alert, familiar, wise)
1
having something on the ball(expression, adjective, idiom, sophisticated, knowledgeable)
1
heady(adjective, smooth, keen, sharp, smart)
1
highbrow(adjective, knowledgeable, intellectual, cultured, learned)
1
hip to(expression, adjective, cool, sensible, familiar)
1
in on(expression, adjective, cool, sensible, familiar)
1
in the secret(expression, idiom)
1
in to(expression, adjective, familiar, wise, knowledgeable)
1
in touch(expression, informed)
1
informed of
1
ingenious(adjective, smooth, keen, sharp, smart)
1
inside(adjective, sharp, smart, intelligent, prudent)
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APASmart Define. (2015). in the know thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/in_the_know/thesaurus/synonyms
ChicagoSmart Define. 2015. "in the know thesaurus" https://smartdefine.org/in_the_know/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, in the know thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/in_the_know/thesaurus/synonyms>.
MLASmart Define. "in the know thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/in_the_know/thesaurus/synonyms>