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.
phantasy fantasy fantasie phenates phonates faints vandas vaunts hyphenates vanadous vanities fonts vents feints founts viands
fantasy phantasy nutsy antas antsy bonitas juntas quintas mantas mantuas pinatas pintas centas sonatas teentsy yentas