203 entries under solid topic. ×

1
hopeful(strong, reasonable, certain, definite)
1
immovable(adjective, strong, secure, firm)
1
in fine feather(expression, adjective, idiom, good, strong)
1
incorrupt(adjective, good, strong, right, honest)
1
locked(adjective, strong, firm, short)
1
material(adjective, strong, hard, physical)
1
mighty(adjective, strong, tough, fit)
1
moving(reasonable, realistic, winning, persuasive)
1
okay(adjective, strong, moderate, proper)
1
perdurable(calm, strong, tough, substantial)
1
poised(adjective, calm, strong, secure, firm)
1
possible(adjective, reasonable, honest, sensible)
1
powerhouse(strong, tough, fit, healthy)
1
proved(strong, honest, pure, true)
1
regular(verb, adjective, correct, appropriate, firm)
1
reinforced(adjective, strong, tough, heavy)
1
reserved(adjective, calm, firm, sensible)
1
rooted(adjective, strong, hard, secure, firm)
1
sedate(adjective, calm, quiet, reasonable, firm)
1
self-possessed(adjective, calm, firm, sensible)
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APASmart Define. (2016). sound thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sound/thesaurus/synonyms
ChicagoSmart Define. 2016. "sound thesaurus" https://smartdefine.org/sound/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, sound thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sound/thesaurus/synonyms>.
MLASmart Define. "sound thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/sound/thesaurus/synonyms>