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.
shrewdies shreds shorties shards sherds shairds shrouds charades charities shirts shorts sheroots
shrewdies readies rowdies crowdies priedieus
shrewd shrewdie shred shared shored