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.
colours clours colors colures couloirs coalers coolers collars coilers calories colorize colliers gluers clears collieries gaolers cullers glorias callers galores glories clerisy claries glorious calorize claros glairs glares claroes galeres glaires killers
flours dolours colours valours lours velours clours galores allures floors pallors pylorus valuers floras colures lures dolors sailors tailleurs slurs soilures failures jailors loris gluers bailors blurs lores fluors velures couloirs colors valors pelorus tailors
colour clour color colure couloir