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.
goblet gobbled cablet cobalt gabled cobbled gabbled gabelled cabaletta cabalette cabled kobold kibbled caballed quibbled
blet cablet tablet giblet sublet doublet riblet goblet bolete billet doubled nibbled bluet quibbled rubbled bobbled cobbled cabled abled blot bullet bolt sublot dabbled wabbled pebbled hobbled gabled rabbled bleat babbled cobalt gabbled gobbled bled nobbled boleti tabled kibbled bubbled mobled fabled blat ballet dibbled belt wobbled