unitary vs unity

unitary is not a noun while unity is a noun.

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

unitary (noun)	unity (noun)
	the quality of being united into one
	the smallest whole number or a numeral representing this number
	an undivided or unbroken completeness or totality with nothing wanting

unitary (adjective)	unity (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