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.
shoat shot shat shoot shout shott shote shad shut shod chat shit shoed shady cheat sheet chott shute shade chatty shoddy shitty shadow shooed chaeta chaetae chateau shadowy shittah chad chit shed
shoat oat hat hot moat shott boat shot chott goat ghaut chat phat what phot hate coat haet hoot coati doat wheat cheat shat haut ghat shoot photo shote heat shout
sha shah shaugh shaw shay shea shoe shoo show showy pshaw