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.
trill triol trail trull trial troll drill trolly tirl tearily trolley terrella hydrilla drail trawl drily droll truly derail drolly torula dariole torulae trawley dirl
rill trill krill shrill brill frill prill drill grill zorillo leerily rouille reroll braille hydrilla drily gharial serail zoarial broil aerily derail barilla guerrilla peril sorrily narial virile ferial cheerily wirily warily trull frailly airily hoarily aril serial fierily zorille zoril aerial puerile drail ariel verily grail gorilla oriel riel perilla tearily eerily payroll rile burial brail droll grille curial trial gorily chorial merrily charily roll carrell frail triol rail brillo rial roil zorilla guerilla rille furrily trail frilly troll urial wearily shrilly
tori torii trio atria stria striae