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.
shade shad shady shadow shed shod shat shadowy chad chide shoed shoat shied shote sheet shute chaeta shoddy shooed chaetae chateau shittah chat chid shit shot shut
hade shade had wade hide roadie roadeo made lade cade jade head haed hate fade bade aide sade chad shad haet chide shady
sha shah shaugh shaw shay shea pshaw