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.
spued spud sped siped spaed speed spied sapped speedo seeped supped souped sipped speedy sopped soaped spade sputa spado spout spate spite spode sapid sapote sippet sopite zapped zipped sept spat spit spot
spued ped pud hopped napped peed seeped pepped oped copied pipped sopped popped gypped knapped couped pied gaped lipped beeped sipped lapped cupped kipped jauped roped hyped hypoed riped spud aped loped doped yawped yapped zipped shipped chopped toped cheeped wiped dupped whopped whipped upped supped whapped moped tupped louped tapped cooped speed wrapped pupped spaed depute repped gawped caped rapped shopped dapped reaped bopped tipped happed duped wheeped sapped typed chipped leaped whupped fopped heaped sped gipped kepped ripped poppied coped japed mopped lopped jeeped hipped spied pooped siped raped knopped biped hooped piped looped peeped repute quipped gapped hoped copped capped nipped yauped soaped souped mapped rouped zapped dipped taped topped wapped whooped chapped shaped yipped