impression vs printing

impression and printing both are nouns.

Word	Noun	Adjective	Verb	Adverb
impression	Yes	No	No	No
printing	Yes	No	No	No

As nouns, impression and printing are synonyms defined as:

impression (noun)	printing (noun)
an impressionistic portrayal of a person	the business of producing printed material for sale or distribution
the act of pressing one thing on or into the surface of another	reproduction by applying ink to paper as for publication
(dentistry) an imprint of the teeth and gums in wax or plaster	text handwritten in the style of printed matter
an outward appearance	all the copies of a work printed at one time
a vague idea in which some confidence is placed
a clear and telling mental image
a symbol that is the result of printing or engraving
all the copies of a work printed at one time
a concavity in a surface produced by pressing