Oregano rhymes with:
carbonneau, charbonneau, domino, molineaux, pocono, pompano, albino, altiplano, babineau, babineaux, barrineau, carbonneau, charbonneau, cousineau, domino, galarneau, gastineau, guano, lessnau, martineau, molineaux, mullineaux, papineau, pocono, pompano, rhino, romano, sesno, winnow
Oregano sounds like:
oarsman, oregan, oregon, oregonian, organ, organum, orgasm, origin, orkem, orkin, orkney, orrison, orsini, orsino, orson