institutional vs institution

institutional is not a noun while institution is a noun.

Word	Noun	Adjective	Verb	Adverb
institutional	No	Yes	No	No
institution	Yes	No	No	No

institutional (noun)	institution (noun)
	the act of starting something for the first time; introducing something new
	an establishment consisting of a building or complex of buildings where an organization for the promotion of some cause is situated
	a hospital for mentally incompetent or unbalanced person
	a custom that for a long time has been an important feature of some group or society
	an organization founded and united for a specific purpose

institutional (adjective)	institution (adjective)
organized as or forming an institution
relating to or constituting or involving an institution
characteristic or suggestive of an institution especially in being uniform or dull or unimaginative