209 entries under strong topic. ×

4
broad(adjective, hard, big, heavy)
4
callous(adjective, set, hard, firm)
4
definite(adjective, good, correct, easy)
4
hale(adjective, sound, complete, tough)
4
invariable(adjective, calm, smooth, severe)
4
resolute(adjective, calm, secure, tough)
4
rooted(adjective, hard, secure, steady)
4
serious(adjective, big, pure, important)
4
strapping(adjective, person, body, sound)
4
stubborn(adjective, secure, tough, firm)
4
true-blue(good, open, honest, steady)
4
unfailing(adjective, good, open, sensible)
4
unvarying(adjective, calm, firm, fast)
3
able-bodied(adjective, person, body, sound)
3
absolute(adjective, physical, material, certain)
3
athletic(adjective, person, body, sound)
3
determined(adjective, severe, certain, definite)
3
enduring(adjective, calm, sound, tough)
3
fastened(adjective, substantial, stable, sure)
3
hardened(adjective, set, hard, tough)
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APASmart Define. (2016). solid thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/solid/thesaurus/synonyms
ChicagoSmart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, solid thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/solid/thesaurus/synonyms>.
MLASmart Define. "solid thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/solid/thesaurus/synonyms>