I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
frowns frons firns ferns furans farinas virions farness furanes frounce furanose farinose fairness freeness fieriness furriness frenzy varnas furnace phrensy wyverns
frowns drowns crowns browns tronas roans virions herons neurons morrions morns marrons kroons frons crones turions porns heroins barons pereions perrons prawns pyrones diurons brawns horns groans morions pereons drones carrions borons prions croons maroons hyperons neurones coronas trones sorns durions morons girons gyrons groins irons garrons corns irones chorions