not natural or real; made by humans

fake; imitation

not genuine

counterfeit

a work of art etc that looks genuine but is not

false, imitation

an act of pretending

imagined, unreal

not real or genuine; to make fun of (a person, way of speaking etc) (especially by copying in an unkind or disrespectful way)

artificial, fake

(to make) the cry of a duck; a person dishonestly claiming to have medical knowledge and skill

counterfeit

to pretend (to be in the condition mentioned)

artificial, counterfeit

false; not genuine

counterfeit, fake

a person or thing taking the place of, acting for, another

alternative

not authentic

counterfeit, fake