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.
gaits gats goats gadis gates gaieties gaddis goatees kats guts qats gateaus cats gads gaudies kits qaids kadis coats quits kites cadis cates gauds goads gouts katas qadis gutsy guids caids quiets coitus guides coatis caddis quoits kitties quietus coatees catties caddies goodies cads cots cuts gods kids
aits baits waits gaits its nits hats coitus quiets bitts beauts knits litas mitis qaids gats moats cates hates cadis vats coatis mats quoits neats bits kits peats beats meatus batts kats riatas saids kadis writs fiats pates pitas riots tats tits doats datos duits situs teats whites wadis dits wats wites chats chits ditas shits satis suits bates whats haets cites writes ratos pats sites raitas pits ates reatas fatso dawts padis hiatus zits fates zitis eats gits mates heats dais gates patsy daisy qats raids nites mites fits lats hits cats bitsy aids mauts katas qadis bites kites quits bahts meats coats boites lits jatos matts gadis bats caids nates ghats maids oats dates rates feats goats diets tauts ghauts gnats sadis fats rites mitts rats gites boats sates seats toits whits wheats watts dauts vatus suites dites wits titis tates sits doits ditsy cheats shiatsu shoats
gait gat gadi gaiety gate gateau goat goatee agate