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.
slotter slitter slittier sluttier slater salter siltier slatier saltier saluter sleetier solder slider sultry saltire sledder soldier solider salutary soldiery solitary zealotry zoolater solitaire
allotter slotter plotter blotter lotter balloter floater flouter platter gloater fluttery slitter blatter glitter flitter clouter bolter clatter blottier cluttery clutter plottier reletter littery flutter slittier lottery loiter molter glittery colter clattery flatter jolter bloater flattery latter letter litter looter sluttier