73 entries under fundamental topic. ×

1
bottom-line(adjective, important, significant, original, essential)
1
concealed(adjective, unusual, original, basic)
1
critical(adjective, great, important, original, serious)
1
indispensable(adjective, important, significant, original, essential)
1
meat-and-potatoes(adjective, base, important, significant, last)
1
necessary(adjective, important, significant, original, essential)
1
substratal(adjective, important, significant, original, essential)
1
supreme(adjective, essential)
0
best(adjective, essential, supreme)
0
categorical(adjective, essential, supreme)
0
empyreal(adjective, essential, supreme)
0
empyrean(adjective, essential, supreme)
0
hidden(adjective, unusual, original, basic)
0
highest(adjective, essential, supreme)
0
incomparable(adjective, essential, supreme)
0
latent(adjective, original, basic, hidden)
0
lurking(adjective, original, basic, hidden)
0
max(adjective, essential, supreme)
0
maxi(adjective, essential, supreme)
0
maximum(adjective, essential, supreme)
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APASmart Define. (2016). radical thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/radical/thesaurus/synonyms
ChicagoSmart Define. 2016. "radical thesaurus" https://smartdefine.org/radical/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, radical thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/radical/thesaurus/synonyms>.
MLASmart Define. "radical thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/radical/thesaurus/synonyms>