41 entries under key topic. ×

4
necessary(adjective, important, significant, original, essential)
3
capital(adjective, essential, fundamental, main)
2
chief(adjective, top, essential, prime, vital)
2
congenital(adjective, essential, basic, absolute, fundamental)
2
inborn(adjective, essential, basic, absolute, fundamental)
2
innate(adjective, essential, basic, absolute, fundamental)
2
material(adjective, essential, basic, absolute, fundamental)
2
substratal(adjective, simple, plain, important, significant)
1
connate(adjective, essential, basic, absolute, fundamental)
1
deep-seated(adjective, original, essential, basic, absolute)
1
inbred(adjective, essential, basic, absolute, fundamental)
1
meat and potatoes(expression, adjective, idiom, simple, plain)
1
nitty-gritty(adjective, original, basic, absolute, fundamental)
1
nub(adjective, original, basic, absolute, fundamental)
0
absolute(adjective, basic, fundamental, central)
0
cold(adjective, basic, absolute, fundamental)
0
complete(adjective, basic, absolute, fundamental)
0
ideal(adjective, basic, absolute, fundamental)
0
name of game(expression, adjective, idiom, absolute)
0
name of the game(expression, adjective, idiom, basic, absolute)
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APASmart Define. (2015). underlying thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underlying/thesaurus/synonyms
ChicagoSmart Define. 2015. "underlying thesaurus" https://smartdefine.org/underlying/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, underlying thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underlying/thesaurus/synonyms>.
MLASmart Define. "underlying thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/underlying/thesaurus/synonyms>