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.
goobers cobbers gabbers cabers cobras cubers cowberries kbars kabars kebars gabbros
goobers sobers beers bears fibers fibbers bobbers bibbers robbers biers cobras lobbers libbers mobbers ribbers gibbers dabbers dibbers dobras dubbers tubbers webers gabbers gibers jibbers ribiers jobbers cabers cobbers cubers hobbers libers jibers lubbers nabbers rubbers sobbers jabbers sabers subers daubers dobbers dobros tabers tubers yabbers