12
main(noun, sea, ocean)
12
penetrating(adjective, strong, slight, keen, sharp)
12
arcane(adjective, hard, evil, obscure, heavy)
12
artful(adjective, characteristic, sharp, intelligent, cunning)
12
deep-seated(adjective, down, original, essential, basic)
12
designing(adjective, characteristic, smart, cunning, slick)
12
extreme(adjective, strong, great, sharp, intense)
12
heartfelt(adjective, feeling, strong, great, warm)
12
keen(adjective, clear, strong, tough, severe)
12
serious(adjective, reasonable, keen, important, significant)
11
heavy(adjective, dull, set, strong, tough)
11
absorbed(adjective, excite, intense, property, full)
11
absorbing(adjective, property, captivating, spellbinding, hypnotic)
11
astute(adjective, characteristic, sharp, smart, bright)
11
cunning(adjective, characteristic, sharp, intelligent, cunning)
11
discerning(adjective, characteristic, keen, sharp, smart)
11
involved(adjective, hard, obscure, property, complex)
11
occult(adjective, hard, evil, obscure, heavy)
11
resonant(adjective, strong, intense, big, heavy)
10
ardent(adjective, person, strong, warm, difficult)
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APASmart Define. (2016). deep thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/deep/thesaurus/synonyms
ChicagoSmart Define. 2016. "deep thesaurus" https://smartdefine.org/deep/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, deep thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/deep/thesaurus/synonyms>.
MLASmart Define. "deep thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/deep/thesaurus/synonyms>