Synonyms|359Antonyms|67|Broader|1Narrower|0Related|355

79 entries under substantial topic. ×

1
fixed(adjective, strong, sound, secure, tough)
1
fixed resistant(expression, calm, strong, solid)
1
forcible(adjective, strong, sound, tough, solid)
1
hale(adjective, strong, sound, tough, solid)
1
hard as nails(expression, adjective, idiom, strong, sound)
1
hardy(adjective, strong, sound, tough, solid)
1
hearty(adjective, strong, sound, tough, solid)
1
heavy-duty(adjective, strong, sound, tough, solid)
1
immutable(calm, strong, solid, steady)
1
in fine feather(expression, adjective, idiom, strong, sound)
1
invariable(calm, strong, solid, steady)
1
mighty(adjective, strong, great, sound, tough)
1
muscular(adjective, strong, sound, tough, solid)
1
nailed(calm, strong, secure, solid, steady)
1
perdurable(calm, strong, solid, steady)
1
permanent(calm, strong, solid, steady)
1
poised(calm, strong, solid, steady)
1
reinforced(adjective, strong, sound, tough, solid)
1
resolute(adjective, calm, strong, secure, easy)
1
robust(adjective, strong, sound, secure, tough)
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ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>