Sham
WordNet
adjective
(1) Adopted in order to deceive
"An assumed name"
"An assumed cheerfulness"
"A fictitious address"
"Fictive sympathy"
"A pretended interest"
"A put-on childish voice"
"Sham modesty"
noun
(2) Something that is a counterfeit; not what it seems to be
(3) A person who makes deceitful pretenses
verb
(4) Make believe with the intent to deceive
"He feigned that he was ill"
"He shammed a headache"
(5) Make a pretence of
"She assumed indifference, even though she was seething with anger"
"He feigned sleep"