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.
donut doughnut donate dint dent dunt daunt dunite tenuti downed denote donned denude dainty tenuto dinette dunnite tenuity tonette tent tint
donut nut tenuto doughnut snout minuet snouty runout point onto nonet mount monte minute conto rainout conte knout joint fount font fondu biont peanut count tenuti wont
don dona done donee donna donne donnee down downy udon