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.
donates donuts denotes dunites dinettes dainties dents tonettes dunnites tannates dunts dints doughnuts daunts denudes dynodes duendes dandies tends tints tents taints taunts teinds tendus tenets tondos teentsy tenutos
nates ruinates neonates penates tannates enates donates phonates annates hyphenates senates phenates montes notes gentes sinuates kentes giantess lenites denotes minutes nites counties unites keynotes panties neats pinatas cenotes pintoes coonties pontes sundaes dunites manatees unties conatus chanties gunites shanties pointes chanteys mentees monades connotes pinites punties maenades bounties rentes qanats quintes finites contes countess dainties mannites quinnats aunties gnats kainites banties antes sienites sonatas manats mantes reunites dunnites shanteys gahnites yentes