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.
hoopoes hoopoos hoops hopes hops hippos hippies haps hips heaps huppahs
hoopoes opes whoopies topos topees poesy hoopoos hopes copes copies coupes lopes loupes mopes popes ropes dopes topes whoopees shoppes pes ops