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.
tidy tied didy tide tody toady teddy toddy teiid titty today ted tad did tit tod toad died titi toit duty teed dido doty toed diode tutty dotty ditty duddy didie deedy deity daddy dowdy doody tutti tatty wyted