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.
fibres fibers fibbers fibrous fiberize vibrios vibrissa vibrissae
fibres sabres bobberies sabers fibbers gibers abris bourrees libbers bars kebars cobras jobberies hubris robbers brees cubers sabras braes gabbros kabars libras jibbers jibers dibbers webers berries tubbers tabors dauberies dubbers dobras subareas debris nabbers bores daubries boreas zebras rebores ribbers lubbers sobbers byres cabers bibberies cobbers mobbers hybris bibbers bros barres bobbers goobers jabbers gabbers buries fibers lobbers bares bayberries rubbers libers cowberries kbars jobbers labors gibbers hobbers bras bries reburies sobers burs bris brews dabbers sabirs debars robberies dewberries dobbers subers dobros tabers daubers teaberries tubers rebars yabbers