5
unorthodox(adjective, wrong, strange, exceptional, regular)
5
unsightly(adjective, strange, look like)
4
awkward(adjective, counterfeit, stiff, hollow, shallow)
4
bestial(adjective, evil, nasty, harsh, vicious)
4
brutal(adjective, evil, nasty, harsh, cruel)
4
constrained(adjective, strong, cold, awkward, stiff)
4
cranky(adjective, usual)
4
curious(adjective, unusual, wild, strange, exceptional)
4
genteel
4
good
4
improper(adjective, wrong, unacceptable)
4
manufactured(adjective, fake, false, mock, artificial)
4
mysterious(adjective, unusual, strange, odd, secret)
4
plastic(adjective, fake, honest, false, mock)
4
quaint(adjective, extraordinary, unusual, wild, strange)
4
sinful(adjective, evil, nasty, harsh, corrupt)
4
spooky
4
stagy(adjective, pretentious)
4
stray(irregular, unpredictable, unreliable, unconformity)
4
uncharacteristic(strange, irregular, nonstandard)
10 years ago|21k views|share |citing 
APASmart Define. (2016). unnatural thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unnatural/thesaurus/synonyms
ChicagoSmart Define. 2016. "unnatural thesaurus" https://smartdefine.org/unnatural/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unnatural thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unnatural/thesaurus/synonyms>.
MLASmart Define. "unnatural thesaurus" 30 March 2016. Web. 29 September 2026. <https://smartdefine.org/unnatural/thesaurus/synonyms>