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.
hellos helloes helos hells hillos hullos hallos hollos helios holloos hallows hilloes hulloes hollows holloes hulloos halloas halloes hilloas hulloas holloas halloos heals halls hills halos heils hulls heels heelless haloes hollas hueless hallahs hollies hols hilus hales hails hulas holes hauls howls haoles holies hoyles
fillos hullos phyllos hillos niellos duellos hallos cellos hollos hellos jellos culls fulls hallows follows billows loos ghylls holloos callous callas haloes balls knolls pilose halloes lows mullas helloes helos bullous halloas ills quolls lalls hilloas falls bolls gallows callose malls villous cullis belows solos paellas jills filose sallows mellows polos sloes galls hulloas rills folios folles tulles lose mills nills tolls selles nulls wallows wells wills polios plows challis zealous chills cholos shallows tailles shills sills yells tallows dalles hells phallus fellas floss fallows hulls maills telos tells palls calos rolls fells hulloos fellows helios gallus dills mells gloss olios vills pillows villose jealous failles kilos lolls gills glows hollows sells hilloes halloos alloys follis dells ballsy mulls ploys jells hills xylose bolos bells ollas kolos loss hulloes filos bulls halos allows bellows villus filles hollas boulles ells quills floes holloes quells belles rouilles molls callus fills bills felloes rilles lilos alls holloas villas mallows halls oleos tellys talls flows pilous close polls nolos gallous cloys gulls milos blows aloes calls knells kills dolls tuilles cells scillas pills zills tills pulls slows wallas walls willows milles tallis challas lulls chillis chollas chylous dulls shells silos yellows yills
hell hello hulloa hull hollow holloa holla hilloa hillo hill helo helio heil heel heal hallow halloo halloa hallo hallah hall hilly hollo holloo holly hullo hulloo