4
big(adjective, person, body, strong, sound)
4
boss
4
broad(adjective, strong, hard, big, heavy)
4
cake(noun, block, bar, piece, mass)
4
callous(adjective, set, strong, hard, firm)
4
chock-full
4
chunky(adjective, hard, big, heavy, deep)
4
congealed(adjective, set, hard, tough, firm)
4
congested(adjective, close, short, substantial, compact)
4
consentient(adjective, complete, common, consistent, universal)
4
decided(adjective, certain, serious, resolute, persistent)
4
definite(adjective, good, strong, correct, easy)
4
effective(adjective, clear, sound, extraordinary, important)
4
estimable(adjective, good, great, excellent, perfect)
4
factual(adjective, correct, reasonable, sensible, exact)
4
firmly(adverb, severely, strongly, definitely, strictly)
4
flinty
4
frozen(adjective, hard, firm, stiff, tense)
4
fundamental(adjective, simple, whole, united)
4
gargantuan(adjective, big, heavy, substantial, large)
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APASmart Define. (2016). solid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/solid/thesaurus/synonyms
ChicagoSmart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, solid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/solid/thesaurus/synonyms>.
MLASmart Define. "solid thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/solid/thesaurus/synonyms>