79 entries under significant topic. ×

7
marked(adjective, clear, great, see, rough)
6
central(adjective, important, vital, imperative)
6
eventful(adjective, great, extraordinary, importance, important)
6
famous(adjective, great, solid, extraordinary, unusual)
6
unforgettable(adjective, great, extraordinary, importance, important)
6
weighty(adjective, solid, extraordinary, importance, unusual)
5
vital(adjective, important, imperative)
4
celebrated(adjective, great, extraordinary, important, wonderful)
4
crucial(adjective, great, extraordinary, important, lively)
4
great(adjective, extraordinary, wonderful, famous, exceptional)
4
meaningful(adjective, important, outstanding, vital)
4
serious(adjective, great, extraordinary, important, outstanding)
3
considerable(adjective, clear, vital, greatness)
3
impressive(adjective, great, solid, extraordinary, unusual)
3
key(noun, adjective, information, sign, influence)
3
preeminent(adjective, great, solid, extraordinary, unusual)
2
big(vital, greatness, imperative)
2
critical(adjective, great, extraordinary, lively)
2
esteemed(great, famous, outstanding, vital)
2
heavy(great, extraordinary, outstanding, splendid)
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APASmart Define. (2016). signal thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/signal/thesaurus/synonyms
ChicagoSmart Define. 2016. "signal thesaurus" https://smartdefine.org/signal/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, signal thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/signal/thesaurus/synonyms>.
MLASmart Define. "signal thesaurus" 1 March 2016. Web. 28 September 2026. <https://smartdefine.org/signal/thesaurus/synonyms>