unopen vs closed

unopen and closed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unopen	No	Yes	No	No
closed	No	Yes	No	No

As adjectives, unopen and closed are synonyms defined as:

Other synonyms of unopen include shut.

unopen (adjective)	closed (adjective)
not open	not open or affording passage or access
	(set theory) of an interval that contains both its endpoints
	used especially of mouth or eyes
	not open
	blocked against entry
	not open to the general public
	with shutters closed
	requiring union membership
	not having an open mind