homophony (n.)

"a word pronounced the same as another (whether spelled the same or not) but different in meaning and etymology," 1843, from the adjective homophone (1620s), from Greek homos "same" (see homo- (1)) + phone "sound," from PIE root *bha- (2) "to speak, tell, say." Related: Homophonic. Greek homophonos meant "speaking the same language; sounding in unison; of the same sound or tone."