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.
feature feater future faitour fetor fatter fetter foetor fattier feodary feudary fader fedora feeder fitter fodder footer vetoer vetter viator faddier footier phatter
feature mature nature future couture quatre satire stoure suture datura