sham

something that is a counterfeit; not what it seems to be

a person who makes deceitful pretenses

make a pretence of; "She assumed indifference, even though she was seething with anger"; "he feigned sleep"

make believe with the intent to deceive; "He feigned that he was ill"; "He shammed a headache"

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"