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.
teopan taipan tiepin deepen depone doupioni tuppenny
teopan pan pain taipan pane pawn pean pian apian kneepan japan copen open papain reopen span spawn spean chopin
top topi stope steppe step atopy atop toupee topoi topo topee teapoy tope tepoy tepee tepa teepee stop utopia