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.
helos helios hellos helloes halos heels heils heals hells hallos hollos haloes hillos hullos halloos halloas hilloas hilloes hulloes holloes hols halloes holloas hulloos hallows hulloas hollows holloos hueless heelless hills howls hales hails hilus holes halls hauls hulas hulls haoles holies hollas hoyles hallahs hollies
helos telos els bolos billows phyllos hulloos belows veils hallos fallows hillos kilos mewls kolos hulloes lows jellos filos bels helloes gallows sheols holloes cloys gels felloes villous meals floes follows plows chylous blows hollos hells fells heals glows cels lose olios yellows sheals sells duels dels cellos delis tallows teels chiels zeals polios slows silos pilose tells deils wheals tels seals kneels weals callose niellos calos mells flows hulloas reals willows haloes peels bullous hilloas xylose riels pileous lilos nolos eels heils villose else halos hallows holloos milos gloss halloos gallous hellos mallows floss heels fuels hilloes fellows solos halloas reels callous loos alloys jealous folios filose seels noels fillos ells holloas veals hullos pilous keels allows feels aloes quells bells oleos knells ploys sels hollows peles koels cells polos pillows bellows jells mellows close zealous teals helios mels peals loss dells ceils duellos teles deals deles halloes wallows sloes wells taels wheels chelas cholos shallows sallows shells shiels yells
helo halo heal heel heil helio hell hello