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.
rebar rebore rebury ribber ribier robber rubber rubier ribbier robbery rubbery
rebar kebar debar bar bare bear boar fubar kabar kbar labara lobar zebra weber