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.
souls sols sauls soles sulus solos solus soils soulless soleus sals sullies sels soilless slays sells silos sales sylis slues slews sails seals salsa sills slows sulci sloes seels slaws solace selahs selles sallies sallows scillas sillies zealous sailless cels
fouls ghouls souls noels bulls goals coles haoles bolus kolas tools fuels quolls cauls mauls bolls pules cowls fulls fowls shools chylous tolas dolls jealousy duels sols foils jowls bowls zealous howls jouals holes boules koels fools villous wholes yowls sheols tolls dulse doulas diols mools bolas sauls ulus polis rolls roils owls pulse cholas oils pulls buhls moils gulls polos pilous lulls moles viols gallous hulls nolos cools mulls caules bolos polys mols soles blouse foals poles guls kolos miauls aiolis bullous voles callous pools pileous kohls hauls louse boles gules hulas colas oles coils coulis jealous lolls louis folious violas roles joles gaols boils caulis mules coals hols molls joules lousy blousy moolas soils bilious puls dulls polls cols pulis solos culls pols noils sulus molas doles lulus solus knolls rules tules nulls tolus toils delouse cholos wools toles duals dols reoils shauls shoals shuls wauls yules
soul sol saul soil sola sole solei soli solo sully sulu