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.
maroons marrons morons marinas marines morions morrions morns marranos mourns mirins merinos moreens mureins murines miriness moraines moreness murrains merriness
croons maroons kroons borons heroins prions pereons neurons morrions morions browns frons garrons frowns groans herons diurons drowns tronas turions crowns irones groins gyrons durions coronas morons pyrones perrons carrions hyperons drones neurones trones irons girons marrons virions roans barons crones chorions