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.
grills grilles gorillas krills grails grilse guerillas guerrillas criollos gorals gruels growls graals goorals corollas carioles carrells curls carls garrulous carrioles creels carols crawls corals craals kraals carles creoles carrels carolus carless corrals curlews careless coreless creolise crewless cureless quarrels
rills grills krills brills shrills trills drills frills prills whirls riels gorillas corollas rials riles girls brillos zorillas terrellas broils rails tirls derails morellos drails rerolls payrolls perils drolls serials zorilles zorils dirls zorillos reoils brails carrells guerillas brailles trulls morelles oriels barillas birls trellis roils grails frails burials criollos trials hydrillas rilles gharials trails troilus girolles rouilles aerials perillas serails ariels guerrillas virls grilse grilles arils triols trolls urials rolls
grill grille gorilla gorily grail krill