Atha rhymes with:
inkatha, katha, agatha, aletha, anantha, aretha, bartha, bertha, bolitho, botha, calantha, cleantha, cliantha, diantha, eartha, hertha, hiawatha, hyacintha, iantha, inkatha, jacintha, juditha, katha, letha, martha, mccartha, mintha, murtha, naphtha, philantha, ramtha, samantha, tabitha, tregurtha
Atha sounds like:
ad, ada, adah, aday, add, added, addeo, addie, addy, ade, adee, adey, adia, adid, adieu, ado, ady, ahead, aid, aida, aide, aided, aidid, at, ata, ate, athey, athie, atta, attaway, attie, attitude, attwood, atwood, aud, audet, audette, audi, audia, audio, audit, audited, auth, auto, autodie, autotote, awad, await, awaited, awed, aweida, aydt, ayodhya, ayotte, ayyad