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.
dioramas dirams dramas dorms drams dermas dreams traumas taramas tiramisu dormouse derms trams drums durums dormice dayrooms teraohms terms trims dermis
gramas taramas dramas dioramas rams dermas breams crams dirams drams ihrams praams gouramis prams neuromas kormas grams primas traumas ramus marrams creams zirams brahmas aromas arames roams reams paramos grammas karmas jorams forams dreams frames trams chromas