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.
rolfer rollover reliever
golfer telfer pilfer rolfer wolfer bluffer wolver sulfur leafier mollifier silver nullifier fluffer lowlifer qualifier gulfier lifer cliffier culver fluffier elver vilifier salver solver delver belfry loafer liefer shelver