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.
carpet carped crept crypt craped creped crypto corrupt crapped creeped cropped gript griped groped gripped grouped
carpet harped chirped urped trapt dript rerepeat parapet gript crypt crept corrupt carped irrupt erupt rapt burped bewrapt wrapt roupet repeat peripety rewrapt dropt trippet warped sharped
carp carpi crap crape crappie crappy crepe crepey crepy cripe crop croppie scarp