O'hara's rhymes with:
ohara's, harrah's, ohara's, basara's, berra's, calaveras, cara's, cara'veras, era's, harrah's, ohara's, pantera's, parras, sara's, sarah's, serra's, sierra's, sierras, tara's, terra's, veras
O'hara's sounds like:
o'roark, o'rourke, oars, ohara's, orca, orcas, ores, org, orgies, orgy, orick, orix, orks, orky, oroark, oros, orosco, orosz, orourke, orozco, orrick, orrico, orris, orsa, orsak, orsay, orsi, orso, orwick, orwig, oryx, orzech, orzechowski, ours, ourso