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.
pull pul pulley pula pall poll pule puli pill pally paella pallia pollee pillow pal ply pol pillowy plea peel pele plie pili peal pail play pawl pale plew paly plow ploy pial pool pile pily polo poly pole palea pilau pilaw pilea pilei poilu polio
bull full hull cull gull lull mull null pull dull