to pretend to be (asleep etc); to disguise oneself as; pretense; disguise; (military) to camouflage; camouflage

to forge; to fake; to counterfeit

hypocrite

perjury

hypocritical

forged book; book of dubious authenticity; misattributed book; Apocrypha

puppet army

inferior; false

(ACG) femboy

counterfeit currency

faking a modern object as an ancient one

illegitimate dynasty; pretender dynasty

forged scriptures; bogus classic; pseudepigrapha; apocrypha

(medicine, signal processing) artifact; spurious signal or feature

counterfeit currency

false roof

to prettify; to dress (sth) up

false proposition; fundamentally flawed notion; (in popular usage, can also refer to anything based on a flawed notion, such as a false dichotomy or a question that starts with a false premise)

pseudocode

hypocrite

pseudoscience

counterfeit object; forgery; fake

forger

false positive

false negative

Uncyclopedia (satirical website parodying Wikipedia)

mockumentary