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.
howk hook hock hawk hoke hooky hoick hooka hokey hokku hookah hawkey hockey hawkie hookey hog heck hike hake hogg hick hack haku haik huck haika haiku