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.
labara labra labor libra lobar labour librae liber libri libber lobber lubber lowbrow
labara bra bar debar subarea rebar librae labra bare bear boar bora brae braw bray kebar bura libra fubar lobar cobra sabra kabar zebra kbar dobra
lab labia alba blab blabby flab flabby slab