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.
medals medials modals metals meddles medleys meatless medullas metalise metols models motels mutuels modulus mettles mutuals mateless metalize modiolus matelasse metallize matless middles modules motiles motleys mottles muddles mutules
dals medals modals pedals stales puddles redials dels buttals radials cuddles boodles needles taels wheedles dials peddles dawdles pedalos piddles ruddles duals ideals dols dahls yodels waddles diddles steals seidels riddles deals dales beadles cattalos catalos rattails medials middles models mutuals noddles odyls paddles toddles tails fuddles coattails stalls addles ladles saddles poodles coddles details talus oodles idols vitals reddles fiddles noodles ratals cattails talas retails petals muddles widdles tales caudles totals huddles talls metals meddles idyls heddles bedels padles wedels idles teals buddles raddles rituals sidles daddles doodles yodles
medal meatal meatily meddle medial medially medley medulla medullae metal modal modally