138 entries under significant topic. ×

10
paramount(adjective, good, fine, important, famous)
10
vital(adjective, great, heavy, important)
9
cardinal(adjective, lead, important, head)
9
grave(adjective, great, tough, severe, unpleasant)
9
large(adjective, reasonable, fair, big, important)
9
substantial(adjective, good, great, reasonable, fair)
8
first(adjective, top, superior, unusual, important)
7
central(adjective, lead, important, head)
7
consequential(adjective, heavy, important, substantial)
7
distinguished(adjective, good, bad, great, excellent)
6
essential(adjective, important, original, substantial)
6
fundamental(adjective, important, original, essential)
6
weighty(adjective, great, tough, severe, heavy)
5
eminent(adjective, bad, great, excellent, superior)
5
grievous(adjective, great, tough, severe, unpleasant)
5
material(adjective, important, substantial, large)
5
noticeable(adjective, wonderful, exceptional, marvelous)
5
prominent(adjective, important, wonderful, famous, exceptional)
4
dangerous(adjective, great, tough, severe, unpleasant)
4
excellent(adjective, bad, great, fine, superior)
11 years ago|22k views|share |citing 
APASmart Define. (2015). major thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/major/thesaurus/synonyms
ChicagoSmart Define. 2015. "major thesaurus" https://smartdefine.org/major/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, major thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/major/thesaurus/synonyms>.
MLASmart Define. "major thesaurus" 6 July 2015. Web. 24 September 2026. <https://smartdefine.org/major/thesaurus/synonyms>