Synonyms for unnatural

modified

1. Contrary to nature

   monstrous, phenomenal, malformed, anomalous, irregular, unaccountable, abnormal, preposterous, marvelous, uncanny, wonderful, strange, incredible, sublime, Herculean, Atlantean, freakish, unconforming, inhuman, outrageous, unorthodox, miraculous, contrary to known laws; see also cruel 1, 2, savage 2.

   Antonyms common*, ordinary, usual.

2. Artificial

   synthetic, imitation, manufactured, ersatz, concocted, make-up, fabricated, false, pseudo, fake, put-on*, mock, spurious, phoney.

   Antonyms natural*, occurring, naturally. See syn. study at irregular.irregular.