COUNTERFEIT is validvalid

[v COUNTERFEITED, COUNTERFEITING, COUNTERFEITS] : COUNTERFEITER [n]

148,724 of 196,601 in NWL2023·also valid in CSW24

imitation, also COUNTERFECT [adj COUNTERFEITLY] / to imitate or feign esp. with intent to deceive [v -ED, -ING, -S]