106 entries under substantial topic. ×

1
far-reaching(big, significant, valuable, vital)
1
foremost(adjective, great, big, famous, outstanding)
1
front-page(big, significant, valuable, vital)
1
heavy(big, unusual, significant, serious)
1
imperative(big, significant, valuable, vital)
1
importunate(big, significant, valuable, vital)
1
influential(important, powerful, significant, large)
1
large(big, significant, definite, valuable)
1
material(big, significant, definite, large)
1
mattering much(expression, big, significant, valuable)
1
meaningful(big, significant, large, valuable)
1
necessary(big, significant, valuable, vital)
1
of moment(expression, big, significant, valuable)
1
of substance(expression, big, significant, valuable)
1
perceivable(clear, plain, definite, obvious)
1
ponderous(big, significant, valuable, vital)
1
pressing(big, significant, valuable, vital)
1
primary(adjective, great, superior, big, unusual)
1
principal(adjective, great, extraordinary, big, unusual)
1
relevant(big, significant, valuable, vital)
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APASmart Define. (2015). marked thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/marked/thesaurus/synonyms
ChicagoSmart Define. 2015. "marked thesaurus" https://smartdefine.org/marked/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, marked thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/marked/thesaurus/synonyms>.
MLASmart Define. "marked thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/marked/thesaurus/synonyms>