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.
repairs repros reappears reapers repours repress reprise reappraise repursue rapers ropers rapiers rappers reprice rippers roperies wrappers
repairs pairs pars diapirs spiers spears spars paras pares paris parrs parse pears piers reappears spares appears sparse coappears speirs copiers spires rapiers tapirs