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.
silty silt slaty salty sleety slutty slitty slatey slit slut sild slot salt slat sloyd sault sleet slate zloty saltie siloed sallet salute soiled sailed solute solate ciliate sellout celt sled slid sold
guilty silty kilty milty tilt gilt laity slaty salty melty silt realty velleity wilt polity quilt kilt guilt jolty jollity jilt zloty pilot hilt fluty built lilt slitty vaulty reality fealty platy toilet faulty duality nullity milt malty lealty quality filet shelty
sail scilla sill silly silo soil