118 entries under significant topic. ×

1
imperative(big, substantial, valuable, essential)
1
importunate(big, substantial, valuable, vital)
1
marked(adjective, great, superior, big, unusual)
1
mattering much(expression, big, substantial, valuable)
1
meaningful(big, important, substantial, serious)
1
meat-and-potatoes(adjective, base, important, last)
1
middle(adjective, important, essential, basic)
1
noted(adjective, important, critical, prominent)
1
nuclear(material, important, natural, basic)
1
of moment(expression, big, substantial, valuable)
1
of note(expression, big, substantial, valuable)
1
of substance(expression, big, substantial, valuable)
1
ponderous(big, substantial, valuable, vital)
1
pressing(big, important, substantial, valuable)
1
relevant(big, substantial, valuable, vital)
1
signal(vital, imperative)
1
something(big, substantial, valuable, vital)
1
standout(big, substantial, valuable, vital)
1
substrative(adjective, important, original, essential)
1
superlative(adjective, fine, important, grand)
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APASmart Define. (2016). primary thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/primary/thesaurus/synonyms
ChicagoSmart Define. 2016. "primary thesaurus" https://smartdefine.org/primary/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, primary thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/primary/thesaurus/synonyms>.
MLASmart Define. "primary thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/primary/thesaurus/synonyms>