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.
runout runt rainout runty reunite ruinate rant rent rente riant rondo round rennet ruined reendow
knout runout snout rainout not nut keynote tenuti cannot donut nowt snouty snot fount cenote count note nota peanut pinot snoot connote knot minuet denote minute doughnut mount tenuto
run ruana ruin rune runny prune