notional vs conceptional

notional and conceptional both are adjectives.

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

As adjectives, notional and conceptional are synonyms defined as:

Other synonyms of notional include ideational.

notional (adjective)	conceptional (adjective)
being of the nature of a notion or concept	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