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.
whoofed woofed whiffed wifed waffed waifed weighed whiffet waved wived waived weaved
goofed hoofed roofed whoofed woofed boffed feoffed hooved coifed loafed offed poufed doffed fed