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.
cartel curtal curtly courtly crudely curtail quartile cordelle curdle credal kirtle cradle cordial creedal greatly gardyloo greedily grittily
cartel artel artal aortal rotl retell ratel curtal kirtle aureately partly pertly portly seriately tartly turtle chortle mortal bordel brutely myrtle foretell hartal hurtle irately courtly curtly lyrately fardel peartly portal pretell dartle tritely whortle shortly
carte cart scarred ecarte acarid curt crate carroty carrot carried caried caret cardio cared cardiae cardia card carate carat caird crit kart acaroid scared scart