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.
cads caids cades cadis caddis gads cods cats cuds caddies gauds qaids gadis goads codas quads cates kadis qadis coeds coats codes gaddis coatis cottas catties coatees caddice caducei gaudies codeias cuddies kats qats cots gods gats cuts kids gates quids cutes kudos coots gaits goats guids goods cotes gudes kudus cutis gowds katas 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