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.
sluttier slittier saltier saluter siltier slatier slitter slotter sleetier slater slider salter solider saltire soldier salutary soldiery solitaire solder sultry sledder solidary solitary zoolater
blottier plottier sluttier slittier slitter joltier lottery lotter littery litter flutter flytier blatter platier allotter cluttery glitter guiltier blotter saltier slatier slotter clattery miltier letter maltier faultier flatter flattery glittery flitter floatier clatter plotter fluttery clutter gleetier reletter siltier sleetier flutier vaultier platter latter
slutty slut salute slitty solute