The purpose of the written word is to help you think the concept.

You can read faster if can see the wordand think the concept rather than mentally sounding it out:

    abcdefghijklmnopqrstuvwxyz  

did you really vocalize each letter, or did you just think the concept, "alphabet"?

   alphabetically 

rather than "al-fu-beh-ti-cully" just the concept of "a-z order".

You can also see groups of words at a time:

    The end of the road

and think the concept instead of thinking each syllable.