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.
denude denied denned denote deaned deigned tend dent tendu donut dined dandy tenet dawned dinned donned downed dunned tentie tenuti tenuto dinette tenuity doughnut
nude denude undee dynode vendee node nudie anode bendee endue fondue nide snide vendue indue menudo minuet minute monde sonde sundew indie sundae duende unde undue
den dean dene deni deny diene duenna