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.
fantasy phantasy fantasie faints fonts feints vaunts founts vandas finites vanities vanadous finds fonds fends funds vents fiends fondus founds fundus viands fondues
fantasy phantasy nutsy antas antsy bonitas juntas quintas mantas mantuas pinatas pintas centas sonatas teentsy yentas