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.
hells hellos helloes heels helos hulls heals halls heils hills heelless hillos hollas hullos helios hollos hallos hols hilloes hallahs hulloes hallows holloes hollies halloas hilloas hollows halloes hueless holloos hulloas halloos hulloos holloas halos hauls hulas hales hilus hails howls holes haloes haoles holies hoyles
ells knells dells jells mells tells fells shells bells yells quells sells wells cells hells els bulls callus hellos gulls villas mullas palls fellas jills lulls callas filles veals keels kills feels ceils mewls hillos peles halls folles gallus maills milles heils eels zeals hallos selles ballsy polls tallis lolls pills tels peels duels teals rills deils tolls tulles wheels chelas challas dalles chillis dels chollas cellos shiels hills taels seals sels meals paellas scillas malls peals ollas quills tellys delis dolls teles follis gills riels vills deals walls rouilles hulls cels failles quolls cullis lalls mulls sills mels fulls koels heals dulls noels boulles weals fills knolls jellos else bels reals mills helos phallus heels falls kneels fuels bills phyllos belles ghylls villus veils nulls balls rilles talls gels bolls calls nills hollas pulls galls hollos dills seels ills alls fillos hullos culls tuilles molls rolls wallas zills wills duellos wheals telos reels deles challis chiels teels tills chills niellos sheals sheols shills tailles 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