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.
trig trigo trug trog trick trike triac toric terga traik yttric tricky troika trickie trek turk torc drug drag dreg taroc tarok track troak trock troke truck daric
rig brig frig grig prig rerig trig