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.
slanty slant sealant slainte salinity silent soland salient selenate selenite selenide solenoid
slanty lenity slant salinity pliant plant plaint gallant linty alant eluant felinity flaunt leant flinty valiant volant volante gelant gellant callant coolant glinty planet plenty reliant sealant flaunty