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.
ditto ditty datto dit dita duit diet dite dato doit dido diode titty deity dotty tattoo tittie tet tat tod tatouay dot tot tut did tit duet date tote dote toot duty toed daut data titi died taut didy dodo tate dawt dado toad doat doty tody teat toit deet tout tutu
ditto mitt chitty titty ditty bitty ghetto vitta kitty lotto bitt nitty motto otto petto pitta potto putto datto tattoo witty shitty
ditto ditty dit titty duit doit bitt bitty vitta vittae kitty mitt nitty diet dita dite pitta dotty datto tittie deity witty