Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
moechor, ātus, 1, v. dep. [moechus], to commit adultery (poet. and late Lat.), Cat. 94, 1; Hor. S. 1, 2, 49; Mart. 6, 91, 2; Mos. et Rom. Leg. Coll. 4, 1, 1.