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.
stoops stops stopes stoups stowps steps setups situps stapes steeps stipes stupas stupes steppes
stoops dopas dopes topes topis topos tops autopsy biotopes metopes netops stopes stops stoups stowps
stoop stop stope stoup stowp estop