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.
scrota scrod scart secret secrete skywrote security skort skirt squawroot squirt scared scried screed scored sacred cigaret scarred scoured secured skirret scurried skywrite suckered
scrota carrot carroty cowrote garote garrote griot groat grot grout kurta agorot pokeroot skywrote squawroot
sacra scour sucre scurry scry screwy screw scree scoriae scar scoria score scary scarry scarey scare escrow