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.
ditty dotty ditto titty deity dit didy doty doit diet duty dita duit dite tutty datto tatty tittie did tit tot tatouay tat tut dot doughty tet died tate taut tout dido deet toit titi dawt teat date duet daut dato tody data toot tidy tote doat dote 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
ditto ditty dit titty duit doit bitt bitty vitta vittae kitty mitt nitty diet dita dite pitta dotty datto tittie deity witty