without a name, especially deliberately

unknown, usually by choice

pretending or falsely claiming to be a artistic

pretended expertise in art; affected interest

not genuine

counterfeit

(to make) (something) made or done in imitation of another thing in order to deceive

fake, simulated

a work of art etc that looks genuine but is not

false, imitation

trying to be like another

simulated, unoriginal

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

not genuine or real

fake, false

(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

to have an idea or feeling concerning the possibility or truth of (something); doubtful; possibly not true; a person suspected of doing wrong etc

doubtful

not authentic

counterfeit, fake

that has or have not been claimed

unknown, usually by choice

not natural or normal

not regular; artificial

that cannot be relied on; not to be trusted

not trustworthy, not true