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.
slider solider solder sledder soldier slatier siltier saltier slitter solidary sluttier slittier sleetier soldiery salter slater saltire saluter slotter solitary solitaire sultry salutary zoolater
collider slider solider glider leader builder lewder gladder platier flooder flytier maltier ladder milder bouldery lidar bladder folder leadier sledder vaultier gelder eluder fielder golder bloodier shoulder wilder welder soldier sluttier guiltier louder blader reloader polder coleader gleetier bladdery joltier siltier older colluder molder lauder bolder moulder wielder clowder plodder slittier wieldier flutier loiter boulder gilder bleeder loader deluder alder solder faultier holder blottier bowlder colder balladeer guilder lieder mouldier cloddier miltier cloudier politer liter killdeer moldier balder gladier plaiter floatier plottier lader melder saltier shielder gauleiter slatier sleetier pleader caldera soldiery aulder elder welldoer yielder
slid slide sild sled slit slitty sloid sold soldi soldo solid solidi