unitary vs unit

unitary is not a noun while unit is a noun.

Word	Noun	Adjective	Verb	Adverb
unitary	No	Yes	No	No
unit	Yes	No	No	No

unitary (noun)	unit (noun)
	an assemblage of parts that is regarded as a single entity
	a single undivided whole
	an organization regarded as part of a larger social group
	a single undivided natural thing occurring in the composition of something else
	any division of quantity accepted as a standard of measurement or exchange
	an individual or group or structure or other entity regarded as a structural or functional constituent of a whole

unitary (adjective)	unit (adjective)
characterized by or constituting a form of government in which power is held by one central authority
of or pertaining to or involving the use of units
relating to or characterized by or aiming toward unity
having the indivisible character of a unit