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.
quartic cretic critic cardiac
quartic hieratic uretic diuretic dieretic xerotic cerotic pyretic piratic paretic neurotic neuritic neritic critic cretic iritic heretic aortic phreatic ferritic erratic erotic barytic bardic noritic parotic portico pyritic soritic diaeretic dioritic uratic choreatic
quart quarte quarto quarried quirt squared