Originally, sounding alike; of the same pitch; unisonous; monodic.

Expressing the same sound by a different combination of letters; as, bay and bey.

Now used for plain harmony, note against note, as opposed to polyphonic harmony, in which the several parts move independently, each with its own melody.

Of or pertaining to a homophone or homophony; as, homophonous words.

the phenomenon of words of different origins coming to pronounced the same way; "homophonous words"