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.
softs softas soffits softies sifts soviets safeties sights savates seafoods sightsaw sightsee sovietize suavities
lofts softs tofts phots softas gavots lifts muftis rafts revotes soffits defats sifts divots footsy fets tuffets wafts whiffets shafts fits foots photos gifts wefts hafts haffits fats pivots votes lefts tufts hefts cheviots haffets refits efts befits buffets rifts devotes shifts
soft softa softie softy sift soffit