192 entries under significant topic. ×

1
ugly(adjective, tough, severe, heavy, important)
1
unavoidable(adjective, essential, basic, vital)
1
uncommon(adjective, great, solid, extraordinary, superior)
1
unreal(adjective, superior, big, unusual, important)
1
unusual(adjective, great, solid, extraordinary, superior)
1
venerable(big, important, substantial, large)
1
wanted(adjective, important, serious, essential)
1
worthwhile(adjective, strong, solid, big, important)
0
ample(substantial, large, considerable)
0
appreciable(substantial, large)
0
astronomical(substantial, large)
0
big-deal(large, considerable)
0
binding(adjective, essential, basic, vital)
0
bottom-line(adjective, essential, basic, vital)
0
bulky(big, heavy, substantial, large)
0
comfortable(substantial, large)
0
commodious(substantial, large)
0
compulsory(adjective, essential, basic, vital)
0
durable(large, considerable)
0
elementary(adjective, essential, basic, vital)
10 years ago|15k views|share |citing 
APASmart Define. (2016). momentous thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/momentous/thesaurus/synonyms
ChicagoSmart Define. 2016. "momentous thesaurus" https://smartdefine.org/momentous/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, momentous thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/momentous/thesaurus/synonyms>.
MLASmart Define. "momentous thesaurus" 1 April 2016. Web. 1 October 2026. <https://smartdefine.org/momentous/thesaurus/synonyms>