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.
hyraces races rices rases razes raises razees razzes recess wrasses rosacea reassess rises ruses roses resews resees resays reuses resize resows rooses resaws rouses reseaus reseize
races hyraces aces peaces daces paces saices rices razes rases laces maces fauces fasces faeces facies faces sauces taces