Kowabunga rhymes with:
alvarenga, andringa, bencivenga, berlanga, binga, bubinga, colunga, conga, elzinga, falanga, hayenga, huizenga, huizinga, inga, kasinga, malanga, manga, matranga, mennenga, nanninga, salonga, stanga, stegenga, tamminga, topanga, uranga, wierenga, zamboanga
Kowabunga sounds like:
kapinos, kapnick, kassebaum's, kaufman's, kavanagh, kavanaugh, keeping, kevin's, kevins, kipnis, kopinski, kubinski