impression vs mackle

impression and mackle both are nouns.

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

As nouns, mackle is a hyponym of impression; that is, mackle is a word with a more specific, narrower meaning than impression:

Other hyponyms of impression include edition, proof, test copy, trial impression.

impression (noun)	mackle (noun)
an impressionistic portrayal of a person	a printed impression that is blurred or doubled
the act of pressing one thing on or into the surface of another
(dentistry) an imprint of the teeth and gums in wax or plaster
an outward appearance
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