Ohern rhymes with:
o'hearn, o'hern, ohearn, ahearn, ahern, aherne, hearn, hearne, hern, herne, hirn, hurn, o'hearn, o'hern, ohearn
Ohern sounds like:
o'hearn, o'hern, o'herron, ohearn, oherron, oram, oran, orem, oren, oriana, orin, orion, orman, orme, orn, orna, orne, orona, orran, orren, orrin, orum