loose vs open

loose is not a noun while open is a noun.

Word	Noun	Adjective	Verb	Adverb
loose	No	Yes	Yes	Yes
open	Yes	Yes	Yes	No

As adjectives, loose and open are synonyms defined as:

loose (noun)	open (noun)
	information that has become public
	a tournament in which both professionals and amateurs may play
	a clear or unobstructed space or expanse of land or water
	where the air is unconfined

loose (adjective)	open (adjective)
not tight; not closely constrained or constricted or constricting	ready or willing to receive favorably
not compact or dense in structure or arrangement	affording unobstructed entrance and exit; not shut or closed
not affixed	affording free passage or access
(of textures) full of small openings or gaps	(set theory) of an interval that contains neither of its endpoints
not literal	open and observable; not secret or hidden
lacking a sense of restraint or responsibility	used of mouth or eyes
not tense or taut	ready for business
casual and unrestrained in sexual behavior	not having been filled
emptying easily or excessively	(of textures) full of small openings or gaps
(of a ball in sport) not in the possession or control of any player	openly straightforward and direct without reserve or secretiveness
not officially recognized or controlled	not requiring union membership
not carefully arranged in a package	open to or in view of all
having escaped, especially from confinement	possibly accepting or permitting
	without undue constriction as from e.g. tenseness or inhibition
	having no protecting cover or enclosure
	affording free passage or view
	with no protection or shield
	accessible to all
	not sealed or having been unsealed
	not brought to a conclusion; subject to further thought
	not defended or capable of being defended

loose (verb)	open (verb)
become loose or looser or less tight	make available
make loose or looser	become available
turn loose or free from restraint	make the opening move
grant freedom to; free from confinement	cause to open or to become open
	become open
	spread out or open from a closed or folded state
	display the contents of a file or start an application as on a computer
	afford access to
	start to operate or function or cause to start operating or functioning
	begin or set in action, of meetings, speeches, recitals, etc.
	have an opening or passage or outlet

loose (adverb)	open (adverb)
without restraint