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.
tetanus tetanies titanous tetanise titans detains detinues titanias tetanize titaness detainees dittanies dedans deadens tautens deadness tautness tattiness teutonize dudeens
tetanus tans shaitans titans gitanos seitans cetanes retains reattains rattans ratans cotans tains soutanes butanes attains tonus tansy stains detains phytanes stanes titanous witans sheitans