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.
dredge drudge dirge dragee trudge targe triage
dredge ridge barege bridge fridge verge greige grudge merge parridge porridge serge drudge trudge
dare readier deodar deader reedier redry redrew redraw redear redder reader dere dure drew dree dore dire deedier deodara