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.
cornus corns corneous corneas coronas curns carns cairns croons crones cranes crowns cornice cronies currans carnies careens korunas carneys carinas carrions goriness crannies kirns grans grins kerns karns groins groans querns grains kroons kernes greens groynes garrons gurneys grayness greenies greyness guaranas guaranis guernsey currency grannies
cornus sarans rins urinous mirins cairns learns durns bournes ferns burns burins morons varnas borons brens bourns herns neurons frons corns garrons kernes kirns girns brins yarns sharns warns tyrannous ternes darns serins reearns lorans churns curns trans ernes sorns purins brans hyperons horns pirns gyrons porns barrens grins karns girons barns grans barons furans ornis herons airns runs bairns wyverns burnous sarins earns firns arenous tarns liernes carns morns urns ruinous kerns mourns querns currans prunus journos pornos irons perrons wrens pyrans syrens erns turns shairns burans marrons reruns sirens diurons terns uranous warrens shorans yearns
cornea corn cornu cornua corny crane acorn coreign crony carn carney crania corona carnie cranny crone coronae curn carny scorn