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.
howls hols holes holies hoyles hollos hollas haoles holloas hollies holloos holloes hallows hollows helos hulas hills hails halos hales heals halls heils hauls hulls hells hilus heels haloes hallos hullos hillos helios hellos halloos hueless hulloos halloes halloas helloes hilloas hilloes hallahs hulloas hulloes heelless
bowls howls owls yowls fowls jowls cowls shools foals molls belows hollows noils knolls lowse fools mewls kolas fallows oles boles bolls moles mools sallows aiolis polos blowsy voles polys haoles yellows pawls moolas colas sheols hols shallows cholas willows wawls tools tolls tolas tallows dolls solos diols fellows roles soils bolas mellows reoils oils kolos polis bawls goals bolus solus bolos molas blows joles gallows holes pols coals kohls polls noels rolls koels plows roils ghouls allows cools fouls hallows awls violas lows coles follows cols boils nolos gaols coils flows lolls billows sols foils bellows poles viols mallows pools glows moils slows mols quolls souls soles doles dols toils toles tolus wallows wholes wools cholos shawls shoals yawls pillows
howl haole hole holey holla hollo holloa holloo hollow holly holy hoolie hooly hoyle dhole