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.
biopsy bops baps beeps bypass buppies
popsy biopsy ops topos whoops dopes topes soaps soups opus lops roups gipsy coops chops oops opes knops loops mopes goops coups copse cops copes woops poesy mops fops loups hopes kops gypsy ropes popes hops pops poops hoops posy bops lopes hyssops sops dopas tipsy topis tops whops wops shops