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.
codeines codeins codeinas codens codons cadence coetaneous goodness cuteness gaudiness cattiness goutiness cotans cutins cadency cadenza catenas cottons godowns ketenes ketones kidneys cutinise cutinize cutaneous quietness
codeines lateness giddiness tattiness rootiness matiness beadiness bittiness goutiness fadeins cuteness battiness mutinies neotenies bawdiness cattiness headiness pettiness muteness tines nattiness betaines shadiness woodiness weediness doughtiness reediness fattiness retines wideness readiness detinues poutines butenes rudeness luteins seediness moodiness steins nuttiness rowdiness ruddiness neediness patines pottiness iodines codeinas denes nudeness knottiness denies dienes liteness ketenes dueness tineas meatiness routines tidiness jettiness mutines gaudiness codeins redenies detainees muddiness sootiness matinees ruttiness dines ratines dottiness wittiness tenues retinues haughtiness retenes dowdiness whiteness chattiness shoddiness