1 man-made, manufactured, non-natural, plastic, synthetic
2 bogus, counterfeit, ersatz, fake, imitation, mock, phoney or phony (informal) pseudo (informal) sham, simulated, specious, spurious
3 affected, assumed, contrived, false, feigned, forced, hollow, insincere, meretricious, phoney or phony (informal) pretended, spurious, unnatural
Antonyms
authentic, frank, genuine, honest, natural, sincere, true, unaffected