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.
today tody toddy toady tod toad toed tatouay tidy doody tatty teddy dowdy daddy tat tot tad ted dad teat tote dada toot dodo daut duad duty data dawt didy tate doty tide teed dead date dita taut dado tied toit dato tout
today day oda odah woody noddy toddy doody moody toady dowdy soddy rowdy payday odea midday soda mayday tatouay coda howdy hoody heyday boody body podia goody tody shoddy
today oda tod toea coda odah odea soda stoa stoae stoai toad toady toddy tody toed