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.
gads gauds gadis goads gaddis gods gats cads gaudies cadis goats qaids qadis gaits guids kadis quads goods gates gudes gowds caids cades guides caddis goodies goatees goddess caddies gateaus cats guts gaieties kats cuds kids qats cods kudus quids gouts katas kudos cates coats codas codes coeds gutsy quods
ads lads chads wads tads deads roads rads naiads kneads meads mads loads leads quads bads goads gads cads heads fads beads pads reads dads duads toads woads shads