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.
truly trull torula trolly trolley tirl trawley tearily torulae dryly trill triol trial trawl trail troll drily drawly drolly drooly dearly direly dourly terrella dirl
ruly truly morula merely knurly curule gruel cruel parley neurula poorly hourly rarely hurly burly sorrily fierily early surely eerily yarely dearly ferly dourly ferula dryly ferrule cheerly torula aerily burley wearily wirily charley verily leerily girly queerly hurley sorely purely parlay pearly curly gorily tearily nearly merrily gnarly marly rely fairly airily furrily barley cheerily charily whirly warily trull barely ferule sourly drily wryly direly rule surly hoarily sheerly yearly