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.
scoured scored secured scurried sacred scared screed scried squared sugared scarred squired suckered scrod secret skirred secrete saggared saggered security scart skort scrota squirt cigaret saggard skirret
scoured augured squired secured scored required recurred liquored leaguered figured quired cored gourde gourd gored curred cured squared chequered
scour scaur score scoria scoriae scurry secure