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.
focus ficus fucus fucous fogs fugs fugus fucks fecks vogues fugues fiques fucose ficoes fox vacuous fags faux figs foxy vacs vugs
hocus locus focus docs socks souks ruckus scouse hocks mucus rocks raucous vacuous dioicous shocks fucus nocks locks ficus mocs caucus fucous jouks jocks ocas bocks ecus cocos aqueous locos mocks recuse pocks nocuous knocks mucous cues cocks cocas cuss bogus rocs rugous socas soukous zouks docks chocks yocks