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.
pereons pereions perrons hyperons preens prions pyrones pyrenes porns pirns pureness purins prunus pyrans pornos prawns parians piranas puranas paranoias prunes purines
pereons roans morrions garrons groans croons hyperons neurones borons careens coronas irons pyrenes preens sereins wrens sirens gyrenes arenas diurons herons drowns barons terreens barrens treens arenes tronas kroons tureens morions warrens marrons boreens reins serenes morons crowns greens crones neurons mureins pereions gyrons carrions irones prions perrons pyrones virions girons brens frowns maroons turions moreens trones groins triens terrenes phrensy browns durions frons drones heroins syrens chorions