conceptional vs conception

conceptional is not a noun while conception is a noun.

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

conceptional (noun)	conception (noun)
	the act of becoming pregnant; fertilization of an ovum by a spermatozoon
	an abstract or general idea inferred or derived from specific instances
	the creation of something in the mind
	the event that occurred at the beginning of something

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