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.
tergal trigly treacle treacly turrical trickly trickily
tergal argal warragal cercal hypergol gurgle gargle frugal argol burgle argle argali argala rugal regale regal warrigal
terga trig trigo trog trug steric