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.
sureness soreness sourness serenes sirens syrens sciurines sorriness sereins serines saurians sorns sarans sarins serins serranos
bareness freeness trueness soreness pureness sureness moreness direness rareness furriness renews rawness fieriness hairiness grayness miriness greenness farness ironness tarriness sorriness trienes fairness harness serenes pyrenes arenes poorness hoariness terrenes weariness wornness leeriness cheeriness ernes liernes airiness beeriness gyrenes lornness kernes merriness baroness dryness barrenness greyness queerness teariness narrowness dearness eeriness wryness sourness nearness goriness greenies dourness ternes wariness wiriness chariness brownness sheerness