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.
cruet caret curet crude create croute cart cred curt crit crud curette cried creed carat court carte credo kraut cared crate great greet grout cored cured caried grouty curite curate carrot garret carate cruddy curred corrode cardiae carried curried carroty corrade cowrite cowrote crowdie card cord curd grat grit grot kart
cruet ret rut rude bruit surety prude kraut greet garret rued arete rete barret caret rout terret tret trued whereat beret brut fruit ferrety trout virtue great terete pruta fret perdue treat grout turret buret ferret curet hereat brute crude hereto whereto
cru care core crew cure grue acre ecru ocrea ocreae scree screw screwy