scan vs scansion

scan and scansion both are nouns.

Word	Noun	Adjective	Verb	Adverb
scan	Yes	No	Yes	No
scansion	Yes	No	No	No

scan (noun)	scansion (noun)
the act of scanning; systematic examination of a prescribed region	analysis of verse into metrical patterns
an image produced by scanning

scan (verb)	scansion (verb)
obtain data from magnetic tapes or other digital sources
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