notion vs notional

notion is a noun but notional is not a noun.

Word	Noun	Adjective	Verb	Adverb
notion	Yes	No	No	No
notional	No	Yes	No	No

notion (noun)	notional (noun)
(usually plural) small personal articles or clothing or sewing items
a general inclusive concept
an odd or fanciful or capricious idea
a vague idea in which some confidence is placed

notion (adjective)	notional (adjective)
	being of the nature of a notion or concept
	indulging in or influenced by fancy
	not based on fact or investigation
	not based on fact; existing only in the imagination