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.
shrouds shards sherds shreds shairds choroids sheroots chorioids shrewdies chards chords shirts shorts cheroots shorties
shrouds rods trouts erodes choroids toroids druids sarods prudes periods marauds gourds crudes crowds corrodes viroids frauds byroads hydroids roads broads aroids rudds routs roods rodes cruds grouts parodos prods sarodes droids broods