387 entries under adjective topic. ×

5
foundational(base, important, significant, last)
5
iconoclastic(skeptical, unorthodox, extremes)
5
irrational(severe, harsh, exceptional, ill)
5
keen(enthusiastic, job, ill, sick)
5
out-and-out
5
primordial(cause, important, significant, original)
5
profound(basic, fundamental)
5
renegade(noun, person, reactionary, insurgent)
5
unconventional(moderate, severe, harsh, new)
5
wide(open, large, tolerant, easygoing)
4
all-embracing
4
beginning(noun, new, hot, natural)
4
bottom(important, significant, original, essential)
4
deep(spread, unusual, fantastic, original)
4
elemental(important, significant, original, essential)
4
far-out(concern, slang, edge, unconventional)
4
groundbreaking(new, original, advanced, pioneering)
4
left(noun, moderate, tolerant, modern)
4
left-wing
4
maverick(noun, person, beat, original)
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APASmart Define. (2016). radical thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/radical/thesaurus/synonyms
ChicagoSmart Define. 2016. "radical thesaurus" https://smartdefine.org/radical/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, radical thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/radical/thesaurus/synonyms>.
MLASmart Define. "radical thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/radical/thesaurus/synonyms>