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.
titty tutty ditty tatty tit tittie toit tidy titi deity ditto dotty tattoo tot tatouay tut tet tat dit tout duty doty toot dite tody teat didy taut duit dita doit tied tote tate tide tutu
bitty nitty ditty witty shitty kitty chitty titty mitt potty laity pitta dotty gnatty fatty nutty whity catty netty knotty city jutty whitey gaiety moiety ditto rutty cutty putty pity piety patty batty butty vitta ratty jetty petty natty bitt deity jotty mity tutty tatty gutty chatty
titty tittie tit kitty tutty mitt toit bitt bitty vitta vittae pitta ditto ditty tattie tattoo tatty titi nitty tutti witty