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.
cadis caddis cads caddies cades qadis gadis caids kadis gaddis coatis catties gaudies caducei cats gads cuds cods caddice cuddies coeds coats gaits codes cates goads codas gauds quads cutis qaids cottas cuties coitus codeias cooties coatees kiddies goodies cutties gaieties cots cuts gats gods kats kids kits qats
cadis gadis sadis kadis padis qadis wadis dis ads leads eddies bads beedies fuddies heads hades cads adds hoodies iodise biddies bawds caids bodies kneads roadies foodies daisy radios reads fados boodies mauds bauds howdies gaddis rads medias naiades soddies dads shoddies shades woodies widdies wads wadies waddies toddies toadies teddies duads doodies didies saids neddies daddies diss fades midis baits ladies readds kiddies maids caddies meads lads gads jades coatis audios paddies raids goads loads caddis dies medius roads rowdies noddies laddies adios radius muddies aids sades gauds gaudies fads cades cuddies goodies mads lades quads aits lauds giddies bawdies baddies nudies dadas beads nadas gaits pads dais buddies readies middies qaids cedis redias naiads ados dados satis deads dits dowdies tads tidies toads todies wades bidis waits woads chads shads yauds
cadi cad caddie caddy cade caid gadi kadi qadi scad