unnatural (adjective) unnatural: not regular; artificial
Sinonime: aberrant,
abnormal,
affected,
anomalous,
assumed,
bizarre, concocted,
contrary,
contrived,
ersatz*,
extraordinary, fabricated, factitious,
false, feigned,
forced, freakish, freaky,
imitation,
incredible,
insincere,
irregular, labored, made-up, make-believe,
odd,
outlandish,
outrageous,
perverse,
perverted,
phony,
preposterous,
pseudo*, put-on,
queer, staged,
stiff, stilted,
strained,
strange,
studied,
supernatural,
synthetic,
theatrical, unaccountable,
uncanny, unconforming,
unorthodox,
unusualAntonime: acceptable,
genuine,
natural,
real