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.
hyperons pereons perrons pereions prions pyrones porns pirns pyrans pornos preens prunus purins prawns parians piranas puranas pyrenes pureness paranoias prunes
hyperons herons erns kerns gyrons browns garrons groins borons barons roans irons ernes coronas morons liernes querns neurones croons ferns pereons prions reearns serins drones durions terns trones chorions marrons frons crowns irones drowns ternes reruns diurons perrons pyrones virions pereions earns carrions wyverns herns turions tronas heroins girons frowns crones groans kernes kroons learns maroons morions morrions neurons yearns