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.
trashed tracheid torched trachyte tracheate trichite trichoid trochoid
crashed trashed preached perished nourished crushed creeshed freshed broached brushed breached airshed rushed roached reshoed reached cherished
trash trashy trachea tracheae trishaw