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.
shairds shards chards sherds shirts shreds shrouds charades shorts chords charts chariots choroids sheroots shorties charities chorioids shrewdies
cairds yairds shairds lairds yards girds hairdos shards wards hoards chards weirdos sarods pards liards braids irids fards farads fiords hards sards airts weirds birds beards bards bardes nards guards boards cards lards raids yirds
shaird chaired shard shared sheared shirred shirt shirty