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.
reruns reearns rareness
runs reruns girns cairns mourns airns querns gyrons ernes herns burans kirns curns kernes ferns prunes runes varnas horns corns burns bairns frons barrens brins grins ternes yarns durns sharns churns liernes warns turns marrons trans morns ornis pornos darns ruins serins sorns rouens sarans perrons purins reearns wrens rins bournes bourns mirins neurons carns korunas girons morons cornus currans wyverns irons furans earns erns barons kerns brans grans firns karns herons bruins barns pyrans borons hyperons learns brens pirns sarins burins syrens sirens journos diurons prunus garrons terns triunes porns urns warrens lorans shairns shorans tarns yearns