imitation or enactment, as of something anticipated or in testing.

the act or process of pretending; feigning.

an assumption or imitation of a particular appearance or form; counterfeit; sham.

Psychiatry . a conscious attempt to feign some mental or physical disorder to escape punishment or to gain a desired objective.

the representation of the behavior or characteristics of one system through the use of another system, esp. a computer program designed for the purpose.

noun

carbon copy , clone , copy , counterfeit , duplicate , duplication , facsimile , fake , image , likeness , match , mirroring , paralleling , reflection , replica , reproduction , sham , ersatz , imitation , pinchbeck , acting , disguise , dissemblance , masquerade , pretense , show