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.
caret cart cared carat carte curet cruet garret create carrot caried carate curt card crit kart curette carroty cred cardiae carried court caird cried creed greet cured great crude credo karat crate cored quart curred curate curite karate quarto cardia croute cardio garred garote quarte garotte curried cowrote garrote corrode cowrite crowdie corrade garrotte quarried cord crud curd grat grit grot
caret art ret greet fared treat turret tarty terete dart tarot hereat whereat peart reared oared part quarte mart kart shared hereto wart geared garret cruet eared cart chared seared buret cared heart hared ferrety feared fart surety boart hearty tared fret hart barret carte great curet rete airt arty barde bared quart quarto beret karat warty ferret wared tret terret teared tart dared arete soared carat rared party pared neared whereto chart roared sheared
care car screw scary carr carry core crew cure acari acre agree ocrea ocreae scar scare scarey scarry scree screwy