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.
spouts spots sapotas sapotes spits spuds spats septs spaits spates spites spodes sippets sopites speedos spitz spades speeds
copouts pouts wipeouts spouts sapotes poets teapots depots reputes puts spots sapotas piteous putts pots deputes boughpots bowpots capotes coopts opts apodous repots potsy
spout sapota sapote souped spode spot spotty spud spued sputa