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.
endure enduro ender endear entire entree enter entry entera
coendure endure rondure denture centaurea nature bandore enduro venture geniture jointure candour pandour pandura renature ceinture miniature denature pandore undrew