88 entries under adjective topic. ×

22
non-mainstream(characteristic, quality, oddity, weirdness)
19
nonmainstream(characteristic, quality, oddity, weirdness)
18
unconventional(characteristic, quality, difference, irregularity)
18
uncommon(characteristic, quality, difference, irregularity)
14
extraordinary(characteristic, quality, difference, irregularity)
12
rare(characteristic, quality, difference, irregularity)
11
fringe(noun, characteristic, quality, difference)
9
unorthodox(characteristic, quality, difference, irregularity)
9
unusual(characteristic, quality, difference, irregularity)
9
exceptional(characteristic, quality, difference, irregularity)
8
curious(characteristic, quality, peculiarity, strangeness)
8
singular(characteristic, quality, peculiarity, oddity)
7
bizarre(characteristic, quality, peculiarity, strangeness)
6
eccentric(characteristic, quality, difference, irregularity)
6
infrequent(characteristic, quality, difference, irregularity)
6
odd(characteristic, quality, difference, irregularity)
6
remarkable(characteristic, quality, peculiarity, oddity)
6
strange(characteristic, quality, peculiarity, oddity)
5
out of the ordinary(expression, characteristic, quality, peculiarity)
5
abnormal(characteristic, quality, difference, irregularity)
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APASmart Define. (2016). mainstream thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/mainstream/thesaurus/antonyms
ChicagoSmart Define. 2016. "mainstream thesaurus" https://smartdefine.org/mainstream/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, mainstream thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/mainstream/thesaurus/antonyms>.
MLASmart Define. "mainstream thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/mainstream/thesaurus/antonyms>