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.
drills drails drolls trills hydrillas derails dirls darioles trails drawls drools trulls triols trolls trials trailless trellis troilus doorless trolleys trollies tirls hydrolase terrellas trawls torulas tearless tireless trawleys treeless
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
drill drily dariole dirl drail droll drolly dryly trill