"gave false testimony under oath"
"false tales of bravery"
"a false assumption"
"a mistaken view of the situation"
"a false start"
"a false alarm"
"false pretenses"
"delusive faith in a wonder drug"
"delusive expectations"
"false hopes"
"it isn't fake anything; it's real synthetic fur"
"faux pearls"
"false teeth"
"decorated with imitation palm leaves"
"a purse of simulated alligator hide"
"a suitcase with a false bottom"
"a false (or sour) note"
"her singing was off key"
"an assumed name"
"an assumed cheerfulness"
"a fictitious address"
"fictive sympathy"
"a pretended interest"
"a put-on childish voice"
"sham modesty"
"a false friend"
"when lovers prove untrue"
"he behaved treacherously"
"his wife played him false"