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.
ponce pounce pence pones peones ponies peonies pons panacea pinnace hyponeas penes pions peons pines panes poons paeons pensee pannes pawnees pennies pinnies pans pens pins puns hyponoias
nonce ponce once faience hones fiance bounce phones menace launce quince bonze nance peones nice fence pounce science since zones dunce tones wince chance bones jaunce hance jones whence sones dance rance seance nones hence pones ounce tenace pinnace wincey pence ones nuance jounce fiancee mince leones lance cones yince
peon peony pion pone pony poon upon