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.
nodules noddles noodles nodulose nodulous needles knotless needless noteless netless nettles nautilus
modules nodules dulls fiddles poodles middles hoodless idles modulus meddles raddles doles dulse godless cedulas mutules duels leadless dales coddles budless ridleys reddles diddleys chadless widdles daddles weedless toddles fuddles doodles deedless heddles odyles peddles needless seedless addles deles rodless paddles duals ladles ediles boodles caudles noddles cuddles aidless heedless saddles beadles audiles radulas tulles aediles huddles medleys tules butles puddles lidless buddles bedless roadless riddles muddles padles ruddles foodless noodles sidles headless piddles oodles diddles diddlies toadless needles waddles wheedles dawdles woodless yodles
nodule nodal nodally noddle noodle unduly