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.
casettes cassettes caseates castes casts gazettes cosets coasts gaseities cossets casitas cassatas coesites costs gasts custos caestus gussets gustoes keysets quaysides gusts kists
casettes fossettes rosettes gazettes poussettes musettes noisettes cassettes mozettas societies cetes settees caseates bassetts mozzettas gestes niceties suttees setts nauseates testes
casette cast caseate cased casita cassette caste caused coast coset