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.
caddies caddis cuddies caddice cades cadis gaddis cads gaudies catties kiddies qadis cates caids codes gadis kadis coatis cuties goddess cutties kiddoes coatees cooties goodies caducei cods gads cuds cats gaieties cotes coats gaits qaids cutis gudes goads gates kites cutes quads codas gauds coeds quiets cottas kiddos coitus cuteys guides cutesy codeias cutesie gateaus goatees keddahs kitties quietus
biddies teddies middies cuddies giddies caddies fuddies toddies daddies noddies widdies shoddies waddies muddies buddies eddies baddies soddies laddies kiddies neddies paddies dies caddis foodies gaddis didies bodies hoodies howdies eddoes rowdies toadies readies wadies goodies woodies nudies ladies caddice boodies kiddoes bawdies dudes goddess diets doodies todies tidies gaudies dowdies roadies beedies adieus dites dis
caddie cadi caddy cuddie gaddi cad