156 entries under strong topic. ×

1
impervious(adjective, set, tough, solid)
1
in fine feather(expression, adjective, idiom, sound)
1
iron(adjective, mean, hard, tough)
1
locked(verb, adjective, sound, secure)
1
massed(adjective, hard, substantial, sturdy)
1
material(adjective, hard, substantial, sturdy)
1
mighty(adjective, sound, tough, solid)
1
muscular(adjective, sound, tough, solid)
1
nailed(verb, adjective, secure, solid)
1
physical(adjective, hard, substantial, sturdy)
1
powerful(adjective, sound, tough, solid)
1
prevailing(natural, regular, definite, normal)
1
reinforced(verb, adjective, sound, tough)
1
robust(adjective, sound, secure, tough)
1
rock(adjective, hard, substantial, sturdy)
1
rocklike(adjective, hard, substantial, sturdy)
1
safe(adjective, clear, hard, sound)
1
safe and sound(expression, adjective, idiom, solid)
1
serious(adjective, firm, determined, sober)
1
sinewy(adjective, sound, tough, solid)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 23 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>