138 entries under significant topic. ×

2
elementary(adjective, important, original, essential)
2
fell(adjective, tough, severe, unpleasant, heavy)
2
impressive(adjective, bad, great, excellent, fine)
2
much(substantial, large)
2
renowned(important, famous, outstanding, substantial)
2
super(adjective, bad, great, excellent, superior)
2
superlative(adjective, bad, great, excellent, fine)
1
axiological(adjective, important, original, essential)
1
axiomatic(important, original, basic, vital)
1
bottom(adjective, important, original, essential)
1
bottom-line(important, original, basic, vital)
1
commodious(big, substantial, large, grand)
1
constitutional(adjective, important, original, essential)
1
constitutive(important, original, basic, vital)
1
elemental(adjective, important, original, essential)
1
formidable(adjective, tough, severe, unpleasant, important)
1
foundational(adjective, important, original, essential)
1
grass-roots(adjective, important, original, essential)
1
heavy(adjective, great, tough, severe, important)
1
indispensable(adjective, important, original, essential)
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APASmart Define. (2015). major thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/major/thesaurus/synonyms
ChicagoSmart Define. 2015. "major thesaurus" https://smartdefine.org/major/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, major thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/major/thesaurus/synonyms>.
MLASmart Define. "major thesaurus" 6 July 2015. Web. 25 September 2026. <https://smartdefine.org/major/thesaurus/synonyms>