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.
guerrilla guerilla gorilla grill grille krill gruel grail curial gorily corolla quarrel carrell cruelly criollo queerly carriole curl cruel curly goral graal growl
guerrilla barilla gorilla guerilla perilla zorilla hydrilla terrella rill