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.
frons frowns firns ferns furans farinas virions farness furanes frounce furanose farinose fairness freeness fieriness furriness frenzy varnas furnace phrensy wyverns
barons gyrons irons diurons borons girons hyperons marrons garrons morons neurons perrons herons frons airns ornis currans burans neurones lorans grins varnas groins brans girns barns burins liernes kerns pereions bourns runs heroins sarans crowns pornos frowns pereons wyverns reearns drones yarns sharns churns warrens urns turions tronas terns tarns durions sorns prions darns mirins serins kroons morrions pyrans kernes barrens cornus roans ferns corns curns brens mourns cairns pirns bournes reruns carrions carns erns browns grans learns herns morns journos croons maroons horns furans bairns crones virions morions burns firns brins pyrones earns syrens querns karns ernes coronas rins purins groans wrens sarins kirns porns irones sirens drowns durns ternes trans trones turns warns chorions shairns shorans yearns