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.
penury penner pinery panier panner pawner pawnor pinier pinner punier punner pannier pioneer punnier
penury knaur pinery onery manure gunnery hymnary nary beanery binary coenure enure finery tannery deanery tenure synura winery senary venery vinery inure knur nunnery manuary coenuri quinary canary joinery cannery hennery honour henry denary zonary tenour sunray unary scenery shinnery
pen pean peen pein penna pennae penne penni pennia penny peon peony open