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.
colluder collider colder cloudier coleader golder colter clouter coulter clowder caldera clutter collator cluttery cloddier killdeer glider clatter cloture culture gladder gladier guilder caldaria clattery kelter kilter kultur
eluder colluder deluder wilder bowlder welder elder melder guilder holder gilder cloudier builder collider wielder shoulder colder molder fluter moulder older polluter slider soldier bouldery boulder glider blader bolder lauder gelder golder fielder folder balder aulder alder louder caldera killdeer solider lader milder moldier mouldier polder saluter solder diluter welldoer wieldier shielder yielder
collude collate collet collide collied colloid