ape
aper
conformist
copier
copycat
copyist
counterfeiter
cuckoo
dissembler
dissimulator
echo
echoer
echoist
faker
forger
hypocrite
impersonator
impostor
mime
mimer
mimic
mimicker
mocker
mockingbird
monkey
parrot
phony
plagiarist
poll-parrot
polly
polly-parrot
poseur
sheep
simulator
adherence
adherent
admirer
astronomer
biographer
courtier
craftsman
dependents
disciple
dramatist
flatterer
imitation
interpreter
musician
panegyrist
performer
playwright
practitioner
scholar
swimmer
swordsman
translator