Writers often confuse words in an attempt to appear erudite. One very common example is the misconception that the word ‘utilise’ is a sophisticated variant of ‘use’. The two words do not generally have the same meaning although there may be some occasions where either may be used.
From The Concise Oxford Dictionary (10th edition).
utilise (verb) make practical or effective use of.
use: (verb)
1. take hold, or deploy as a means of accomplishing something.
(use something up) consume or expend the whole of something.
2. treat in a particular way.