The Collaborative International Dictionary
counterfaisance
Counterfesance \Coun"ter*fe`sance\ (-f?"zans), n. [OF. contrefaisance, fr. contrefaire. See Counterfeit, a.] The act of forging; forgery. [Obs.] [Written also counterfaisance.]
Wiktionary
counterfaisance
n. (obsolete form of counterfesance English)