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.
scups scaups scops scapes scoops scopes scapose skeps skips
cups scups teacups checkups caps wickiups mockups recoups beaucoups lockups kickups cockups hookups fuckups becaps equips lookups coupes quips cops makeups kneecaps recaps reequips scops backups scaups takeups coups pickups toecaps wikiups shakeups