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.
putrid puttered petard patriot petered patriate pattered pottered puttyroot powdered
nitrid putrid chytrid druid attrit triad tried trod turd toroid hatred metred torrid deride retard ritard satyrid storied deuteride tetrad trad leotard droid outride bedrid hotrod meteoroid hydride nitride mitred hydroid redried tarried retried hysteroid steroid stride dotard petard hydrid dried
pouter poutier putter puttier sputter sputtery