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.
planate plant plaint planed planet pliant pollenate pollinate plained planned plenty palinode pollened polenta
lanate planate lineate lunate alienate allanite volante melanite pollenate pollinate selenate slainte delineate