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.
gates gats goatees gateaus goats gaits cates gaieties kats catties coatees qats gads gaudies guts cats cotes gauds gudes kites gadis katas gouts kytes goads gutsy cutes coats cades cuteys guides quotes coatis gaddis cutesy cuties cutties cooties cutesie goddess caddies goodies kitties cads cots cuts gods kits
bates dates cates tates hates fates gates ates nates pates mates sates rates lattes gites tees bats ghauts hiatus battues jetties boites fatties butties cutties bytes lats jutties ghats beats peats bahts jutes oats matts booties mutes lottes gnats doats gats hats buteos sites mats boats mateys seats mottoes hotties datos poetess puttees kites mites bawties quotes cuties tauts sties votes titties pats dites reties waits dauts dawts watts wheats whiteys wites suttees cheats duties chutes shiatsu shotes teds tats fetes cuteys patties moieties pieties potties aits moats satis lutes utes kytes tutees batts qats metes rites rottes sades cades cotes writes kats cooties rats bites cutesy sautes cats ditties meatus vatus mottes mattes meats eats fats rotes gaieties fyttes neats stews deities mauts coatis tews vats heats fades beauties fouettes jetes cutes jades buttes butes fatso toes coatees motes wytes footies hades putties teas ghettoes haets gaits katas nites laities goatees baits patsy feats cites beauts goats fiats tutties totes bootees catties routes ties cetes lades jatos vetoes notes reatas naiades coats tatties wats cities riatas tets suites dawties ratos wades dauties pities whats kitties whites whities settees chats dotes chitties shades shoats teats shutes
gateau gate gat cate gaed gaiety gait goat goatee agate