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.
gustoes gusts custos guests gussets gasts gaseities quests castes cuestas caseates casettes gazettes cassettes casts costs kists quaysides coasts cosets casitas cossets keysets
gustoes bastes misdoes mestees bestows lysates stews sties coesites stoss stoas stows resites posties xystos pistes tastes pasties testes nasties sites sates hessites mesteso maestoso custos listees gestes hostess castes hastes vestees beasties pussytoes pistous cestos pestos zoisites pastes testees mustees wastes