generation vs generational

generation is a noun but generational is not a noun.

Word	Noun	Adjective	Verb	Adverb
generation	Yes	No	No	No
generational	No	Yes	No	No

generation (noun)	generational (noun)
the act of producing offspring or multiplying by such production
the production of heat or electricity
a coming into being
group of genetically related organisms constituting a single step in the line of descent
all the people living at the same time or of approximately the same age
the normal time between successive generations
a stage of technological development or innovation

generation (adjective)	generational (adjective)
	of or relating to a generation