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.
leer leery lear lehr lier laree leary lar lira lure lore lour lair liar lire lory lari liri lyre laari laura lorry loury
beer veer jeer queer leer peer seer deer weer cheer sheer er