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.
suqs suks skuas sucks souks scouse squaws segues sukkahs soukous sags sequoias skis segs sics secs sacs skas soaks socks skews sikes sakes socas skees seeks sikas sacks segos scuzz sagos sakis sokes sicks sooks sagas skies scows sykes