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.
loutish loudish latish laddish
loutish fattish fetish hottish cattish goatish latish loudish pettish rattish ruttish sottish dudish wettish whitish
loti lout flout clout glout lot