on

• /ɑn/: conch, con, non, nylon, on, onto, online, onscreen (on-screen), onset, ongoing, onward, onlooker, bronze, ponder, pond, bond, blond, fond, font, respond, beyond, abscond, donkey

• /ʌn/: son, won, one, once, front, affront, monkey
* homophone(異義同音字):won & one; son & sun