64 entries under chief topic. ×

11
grave(adjective, severe, importance, big, important)
11
meaningful(adjective, importance, big, important, significant)
11
serious(adjective, severe, importance, big, important)
11
weighty(adjective, importance, big, important, significant)
10
first(adjective, important, significant, original, prominent)
10
relevant(adjective, importance, big, significant, substantial)
9
capital(adjective, importance, important, prominent, prime)
9
influential(adjective, importance, big, important, significant)
9
outstanding(adjective, importance, important, significant, valuable)
9
significant(adjective, importance, big, important, original)
8
big(adjective, importance, important, significant, substantial)
8
considerable(adjective, importance, big, significant, substantial)
8
foremost(adjective, importance, big, important, significant)
8
paramount(adjective, importance, important, significant, original)
8
urgent(adjective, severe, big, important, significant)
7
major(adjective, important, significant, original, substantial)
6
pressing(adjective, big, important, significant, substantial)
5
special(adjective, individual, intimate, core, key)
4
particular(noun, adjective, drop, material, element)
3
decisive(adjective, severe, big, important, significant)
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APASmart Define. (2016). essential thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/essential/thesaurus/synonyms
ChicagoSmart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, essential thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>.
MLASmart Define. "essential thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms>