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.
comets comtes comates combats comedos commits commodes commutes comedies comities committees coembodies gametes gomutis comatose commodious gamuts gambits gambades gumboots gummites quomodos
fumets maumets ramets mammets comets emmets vomits metis mots omits remits reemits gametes gamuts muts summits meets emits lameds mats limits gemots commits comtes metes remeets meds smuts meats demits
comedo comedy comet cameoed coembody comade comate combat combed comity commata commit committee commode commute comte