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.
saltire saltier salter saluter siltier slatier slittier sluttier salutary sleetier solitaire sultry slater slider slitter slotter soldier solider soldiery zealotry solder sledder
saltire litre faultier philtre vaultier vulture haltere joltier culture guiltier maltier miltier multure saltier siltier solitaire
saltie salt sallied salty salute sault