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.
sharpies sharps charpais sherpas charpoys chirps
harpies sharpies tropes crappies charpais tripes towropes drapes sarapes preppies ripes ropes herpes crapes rapes trapes crepes cripes croppies grapes gripes gropes groupies hyperopes pyropes serapes drupes creepies
sharp sharpie sharpy charpai charpoy sherpa