279 entries under adjective topic. ×

27
principal(significant, essential, basic, vital)
27
substantial(significant, importance, powerful, characteristic)
27
foremost(characteristic, significant, essential, main)
26
material(significant, substantial, importance, characteristic)
25
great(excellent, exceptional, valuable, characteristic)
24
urgent(characteristic, serious, critical, vital)
22
chief(great, significant, essential, basic)
21
signal(outstanding, characteristic, great, extraordinary)
21
pivotal(characteristic, importance, significant, significance)
21
powerful(strong, effective, influential, characteristic)
20
big(substantial, famous, significant, valuable)
20
key(importance, characteristic, valuable, main)
20
main(significant, essential, basic, characteristic)
20
necessary(significant, essential, critical, basic)
20
remarkable(notable, importance, outstanding, great)
19
considerable(significant, substantial, large, ample)
19
impressive(bad, strong, great, excellent)
18
central(significant, essential, basic, vital)
18
illustrious(famous, prominent, eminent, great)
18
primary(significant, substantial, essential, basic)
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APASmart Define. (2016). important thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/important/thesaurus/synonyms
ChicagoSmart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, important thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>.
MLASmart Define. "important thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/important/thesaurus/synonyms>