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.
recourse recurs recross rigours wreckers rockrose requires recarries rakers rigors reekers regress riggers rackers ruggers rockers regrows rigorous wreakers rockeries rogueries rookeries
course recourse carouse coarse corse crouse curse gorse grouse kouros becurse vigours rigours scours