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.
ditch dutch datcha dish tach tech dishy touch teuch dacha tache duchy teach techy douche techie tetchy touche touchy dash tosh tush
aitch hitch witch bitch itch ditch fitch quitch pitch ich natch wretch batch lichi hutch seiche hootch butch latch niche ketch wich catch litchi mutch quiche botchy vetch lich patchy miche dutch tech botch quaich witchy pitchy which hotch ratch match notch bitchy laich fiche gotcha rotch fichu nautch cutch etch datcha hatch watch retch fitchy itchy patch rich rotche catchy tach tetchy letch vichy fetch chichi
dit deity diet dita dite ditto ditty doit duit