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.
peanuts pants paints pantos panties penates pentose punts pints pends puntos points pinots pandas pintos punnets panadas pandies pinatas ponds pintas poinds pontes pounds pinites pintoes pointes punties
peanuts nuts ants aunts antas cantos rants faints mantas quants cantus antsy antes knouts pantos nutsy saints snouts donuts taints tenutos chants chiantis antis vaunts mantis pants doughnuts taunts santos daunts hants mantes runouts rainouts minutes chaunts wants haints paints manats minuets qanats cants jaunts giants haunts shantis