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.
guerillas guerrillas gorillas grills grilles gruels krills grilse grails corollas criollos curls querulous graals gorals growls goorals carioles carrells cureless quarrels carrioles garrulous carls
gorillas guerillas barillas perillas zorillas guerrillas hydrillas rills zorilles trills grilles brills frills grills krills corollas prills zorillos rilles drills variolas terrellas brillos shrills