11
durable(adjective, calm, strong, sound, tough)
11
fast(verb, adjective, adverb, calm, strong)
11
full(adjective, complete, total, enthusiastic, vigorous)
11
impenetrable(adjective, close, set, hard, tough)
11
massive(adjective, person, body, hard, deep)
11
material(adjective, strong, hard, physical, material)
11
powerful(adjective, good, person, clear, body)
11
pure(adjective, good, great, sound, simple)
11
staunch(noun, adjective, calm, good, strong)
11
tight(adjective, adverb, good, close, strong)
11
unanimous(adjective, state, complete, agree, agreement)
11
unbroken(verb, adjective, sound, complete, smooth)
11
united(adjective, state, complete, simple, total)
10
compressed(adjective, set, hard, tough, firm)
10
concentrated(adjective, set, hard, complete, tough)
10
genuine(adjective, good, sound, correct, right)
10
homogeneous(adjective, simple, whole, consistent, universal)
10
immovable(adjective, strong, secure, firm, steady)
10
pacifist
10
robust(adjective, person, body, strong, sound)
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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>