Synonyms|3.3kAntonyms|621|Broader|72Narrower|451Related|3.9k

116 entries under substantial topic. ×

1
hulk(adjective, strong, hard, sturdy)
1
immovable(adjective, strong, secure, firm, solid)
1
in fine feather(expression, adjective, idiom, good, strong)
1
massed(adjective, strong, hard, sturdy)
1
material(adjective, strong, hard, solid, physical)
1
mighty(adjective, strong, tough, fit, solid)
1
perdurable(calm, strong, tough, solid)
1
physical(adjective, strong, hard, material)
1
poised(adjective, calm, strong, secure, firm)
1
reinforced(adjective, strong, tough, solid, heavy)
1
rock(adjective, strong, hard, sturdy)
1
rocklike(adjective, strong, hard, sturdy)
1
rooted(adjective, strong, hard, secure, firm)
1
set in stone(expression, adjective, idiom, calm, strong)
1
solid as a rock(expression, adjective, idiom, calm, strong)
1
stark(adjective, strong, tough, solid, heavy)
1
staying put(expression, calm, strong, solid)
1
unchangeable(adjective, calm, strong, secure, firm)
1
uniform(adjective, calm, strong, secure, firm)
1
unvarying(adjective, calm, strong, secure, firm)
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ChicagoSmart Define. 2016. "sound thesaurus" https://smartdefine.org/sound/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sound thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sound/thesaurus/synonyms>.
MLASmart Define. "sound thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/sound/thesaurus/synonyms>