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

79 entries under substantial topic. ×

3
unyielding(adjective, strong, sound, tough, solid)
2
able(adjective, strong, sound, tough, easy)
2
anchored(calm, strong, secure, solid, steady)
2
calm(strong, solid, steady, even)
2
constant(calm, strong, solid, steady)
2
forceful(adjective, strong, sound, tough, solid)
2
heavy(adjective, strong, sound, tough, solid)
2
tough(calm, strong, sound, solid, heavy)
2
well-built(adjective, calm, strong, sound, secure)
2
well-made(adjective, strong, sound, tough, solid)
1
abiding(calm, strong, solid, steady)
1
able-bodied(adjective, strong, sound, tough, solid)
1
active(adjective, strong, sound, tough, solid)
1
athletic(adjective, strong, sound, tough, solid)
1
big(adjective, strong, sound, tough, solid)
1
brick-wall(calm, strong, solid, steady)
1
capable(adjective, strong, sound, tough, solid)
1
energetic(adjective, strong, sound, tough, solid)
1
equable(calm, strong, solid, steady)
1
even(calm, strong, solid, steady)
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ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>