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.
quads qadis quids qaids quods quotas gads qats cads cuds kudus caids goads kadis gadis gauds cadis gudes cades guids quits kudos guides quiets quotes gaddis quoits caddis quietus gaudies cuddies caddies cats cods cuts gats gods guts kats kids
duads quads ads qaids leudes caids aids kadis naiads pads guids adds readds ouds quids sades gauds bawds kudus judos ados bauds muds loads roads tatouays shads mads chads wads dadas wades udos saids duds dads jades cadis bads suds mauds nadas lauds gadis rads lades goads cades raids buds quods rudds heads dudes cuds nudes wadis kudos toads beads judas cads sadis fados gads fades maids feuds hades shades gudes leads puds padis naiades lads kneads reads ludes fuds fads sudds woads sudsy meads dados deads leuds qadis tads utas yauds
quad qadi qaid quate quid quod equate quacked quaked squad squat squatty