195 entries under adjective topic. ×

31
essential(importance, valuable, basic, fundamental)
23
central(lead, important, head, master)
21
vital(importance, important, valuable, essential)
20
principal(lead, important, head, significant)
19
important(importance, valuable, main, notable)
18
fundamental(noun, important, head, significant)
17
main(lead, important, head, significant)
16
cardinal(noun, lead, important, head)
14
chief(lead, important, head, significant)
14
primary(lead, important, head, significant)
14
crucial(important, significant, original, essential)
13
substantial(importance, important, valuable, main)
13
core(noun, lead, importance, head)
12
grand(lead, importance, head, master)
12
major(lead, important, head, significant)
12
material(importance, important, significant, large)
12
prime(lead, important, head, significant)
12
serious(importance, important, valuable, main)
12
weighty(importance, important, valuable, main)
10
basic(important, head, significant, beginning)
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APASmart Define. (2016). key thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/key/thesaurus/synonyms
ChicagoSmart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, key thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>.
MLASmart Define. "key thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/key/thesaurus/synonyms>