6
piercing(adjective, keen, sharp, intelligent, clever)
6
reasonable(adjective, sound, smart, bright, sensible)
6
sensitive(adjective, understanding, keen, sharp, sensible)
6
sound(adjective, reasonable, sensible, intelligent, wise)
5
brilliant(adjective, sharp, smart, bright, sensitive)
5
clear
5
clear-eyed
5
commonsensical(adjective, reasoning, intellectual, mental)
5
crafty(adjective, keen, sharp, smart, sensible)
5
cunning(adjective, sharp, smart, sensible, intelligent)
5
diplomatic(adjective, smooth, sensible, wise, shrewd)
5
erudite(adjective, sensible, intelligent, wise, learned)
5
luminous(adjective, obvious, understandable)
5
understanding(adjective, smart, bright, sensible, sensitive)
4
adroit(smooth, keen, smart, bright, clever)
4
apt(adjective, smart, bright, wise, learned)
4
cagey(adjective, sharp, ability, smart, careful)
4
careful(adjective, smart, sensible, wise, clever)
4
cognizant(perceptive, observant, insightful, intelligence wisdom)
4
comprehending(adjective, smart, bright, intelligent, brainy)
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APASmart Define. (2016). perspicacious thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/perspicacious/thesaurus/synonyms
ChicagoSmart Define. 2016. "perspicacious thesaurus" https://smartdefine.org/perspicacious/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, perspicacious thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/perspicacious/thesaurus/synonyms>.
MLASmart Define. "perspicacious thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/perspicacious/thesaurus/synonyms>