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.
repoll reply repel repeal replay replow reapply rappel ripely ripply ropily roupily
poll repoll pol maypole dipole cupola zeppole appall spoil apollo spell spall pool pull poly polo pole pill pall spill spool zeppoli duopoly
repo rep reap repay repp arepa crepe crepey crepy preop prep prepay preppie preppy