40 entries under vital topic. ×

2
important(adjective, essential, necessary)
1
all-important(adjective, significant, essential, basic)
1
chief(adjective, significant, essential, basic)
1
expedient(adjective, significant, essential, basic)
1
incumbent on(expression, adjective, significant, essential, basic)
1
name of game(expression, adjective, idiom, significant, essential)
1
of the essence(expression, adjective, idiom, important, essential)
1
quintessential(adjective, significant, essential, basic)
1
specified(adjective, significant, essential, basic)
1
wanted(adjective, significant, essential, basic)
0
basic(adjective, significant, essential, fundamental)
0
bottom-line(adjective, significant, essential, basic)
0
cardinal(adjective, significant, essential, basic)
0
elementary(adjective, significant, essential, basic)
0
fundamental(adjective, significant, essential, basic)
0
momentous(adjective, significant, essential, basic)
0
paramount(adjective, significant, essential, basic)
0
prime(adjective, significant, essential, basic)
0
principal(adjective, significant, essential, basic)
0
significant(adjective, essential, basic, required)
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APASmart Define. (2015). obligatory thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms
ChicagoSmart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, obligatory thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>.
MLASmart Define. "obligatory thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms>