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.
sowens sowans swans sweeneys sweenies sewans swains swoons swouns seawans swinneys
wens sowens rowens tweens dewans swans rowans wheens sowans seawans wans weans weens weensy whenas wons jawans gowans rawins whens rewins deewans sewans diwans wins twins