scan vs glance over

scan is a noun but glance over is not a noun.

Word	Noun	Adjective	Verb	Adverb
scan	Yes	No	Yes	No
glance over	No	No	Yes	No

As verbs, scan and glance over are synonyms defined as:

Other synonyms of scan include rake, run down, skim.

scan (noun)	glance over (noun)
the act of scanning; systematic examination of a prescribed region
an image produced by scanning

scan (verb)	glance over (verb)
obtain data from magnetic tapes or other digital sources	examine hastily
read metrically
make a wide, sweeping search of
move a light beam over; in electronics, to reproduce an image
examine hastily
examine minutely or intensely
conform to a metrical pattern