solitary vs ungregarious

solitary is a noun but ungregarious is not a noun.

Word	Noun	Adjective	Verb	Adverb
solitary	Yes	Yes	No	No
ungregarious	No	Yes	No	No

solitary (noun)	ungregarious (noun)
one who lives in solitude
confinement of a prisoner in isolation from other prisoners

solitary (adjective)	ungregarious (adjective)
being the only one; single and isolated from others	(of animals) not gregarious
lacking companions or companionship	(of plants) growing together in groups that are not close together
of plants and animals; not growing or living in groups or colonies	not disposed to seek company
devoid of creatures
characterized by or preferring solitude