98 entries under adjective topic. ×

1
in demand(expression, idiom, requirement)
1
incumbent on(expression, significant, essential, basic)
1
life-and-death
1
life-or-death(important, essential, critical, basic)
1
main
1
material
1
momentous(important, significant, serious, essential)
1
official
1
paramount(important, significant, serious, essential)
1
primary
1
proviso
1
quintessential(significant, essential, basic, vital)
1
rented
1
right(correct, proper, flawless, faultless)
1
set(obvious, obligatory, compulsory, inevitable)
1
significant(important, essential, critical, basic)
1
specified(significant, essential, basic, vital)
0
textbook(correct, proper, suitable, flawless)
0
worthwhile(necessary, wanted, needed)
0
all-important(significant, essential, basic, vital)
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APASmart Define. (2015). required thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/required/thesaurus/synonyms
ChicagoSmart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, required thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>.
MLASmart Define. "required thesaurus" 3 November 2015. Web. 24 September 2026. <https://smartdefine.org/required/thesaurus/synonyms>