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.
proofs profs profess profuse proves parvos proviso perfuse prophase previous prophesy purifies pervious pervs parvis paraphs parvise preface previse prevues privies purveys previews prophecy purviews
roofs proofs reroofs profs shroffs