130 entries under significant topic. ×

1
extraordinary(adjective, strong, great, solid, important)
1
fab(outstanding, substantial, exciting, impressive)
1
foremost(important, vital, imperative)
1
front-page(big, substantial, valuable, vital)
1
good-sized(substantial, definite, generous, considerable)
1
heavyweight(adjective, heavy, huge, considerable)
1
imperative(big, substantial, valuable, vital)
1
importunate(big, substantial, valuable, vital)
1
main(adjective, vital, imperative)
1
major-league(important, considerable)
1
marked(big, substantial, definite, valuable)
1
mattering much(expression, big, substantial, valuable)
1
mondo(great, substantial, fabulous, incredible)
1
necessary(big, substantial, valuable, vital)
1
of moment(expression, big, substantial, valuable)
1
of note(expression, big, substantial, valuable)
1
of substance(expression, big, substantial, valuable)
1
paramount(vital, imperative)
1
pressing(big, substantial, valuable, vital)
1
relevant(adjective, great, big, substantial)
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APASmart Define. (2016). large thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/large/thesaurus/synonyms
ChicagoSmart Define. 2016. "large thesaurus" https://smartdefine.org/large/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, large thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/large/thesaurus/synonyms>.
MLASmart Define. "large thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/large/thesaurus/synonyms>