226 entries under solid topic. ×

1
reserved(adjective, firm, shy, stable)
1
rheumatic(adjective, hard, firm, stiff)
1
robust(adjective, strong, sound, secure, tough)
1
safe(adjective, clear, strong, hard, sound)
1
safe and sound(expression, adjective, idiom, strong)
1
sealed(verb, adjective, calm, quiet, smooth)
1
sedate(adjective, firm, shy, stable)
1
serene(adjective, calm, quiet, smooth, firm)
1
sewed up(expression, adjective, set, certain)
1
sinewy(adjective, strong, sound, tough)
1
solid as a rock(expression, adjective, idiom, strong, firm)
1
staid(adjective, set, firm, stable)
1
stalwart(adjective, strong, sound, tough)
1
starched(adjective, hard, firm, stiff)
1
starchy(adjective, hard, firm, stiff)
1
stiff as a board(expression, adjective, idiom, hard, firm)
1
stout(adjective, strong, sound, tough)
1
strapping(adjective, strong, sound, tough)
1
stringent(adjective, set, severe, harsh)
1
surefire(adjective, set, certain, definite)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>