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.
phallus phials phyllos falls villus values ghylls valleys failles fallows villous flus ghillies veals vails fulls fails valse foals fells vales vills fills false vials flues fillos valise folles villas fellas ghouls follis filles falsie folious follies follows fallacy fellahs fellies felloes fellows villose fillies volleys
phallus gallus callus alls challas wallas ballsy talls bullous dalles falls palls values malleus hallos lulus balls villous callas halls callous walls talus tallis zealous maills lalls malls jealous galls villus calls gallous challis als