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.
scapes scaups scopes scapose scops scups scoops skeps skips
gapes agapes scapes capes wickapes coupes wicopies capos toecaps cowpies scaups kapas copies recopies okapis magpies koppies copes becaps gaps kakapos gawps kneecaps guppies cowpeas recaps scopes caps kewpies chickpeas
scape scaup scop scope scup escape escapee