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.
curtly courtly curtal curtail cartel curdle crudely greatly quartile grittily cordially cradle credal kirtle cordial creedal cordelle greedily
courtly partly portly peartly shortly tartly pertly curtly lairdly hartal heartily aureately grittily brittly dirtily lordly turtle rotl brightly buirdly tartily seriately dartle prettily chortle myrtle irately portal artal hurtle mortal rattly greatly artel artily curtal tritely weirdly ruttily aortal fruitily cartel brutely kirtle hardly lyrately whortle
curt cured kurta curried curred curite curette curet curdy cart curd curate crit crate court carte scurried