preconceived notion vs preconception

preconceived notion and preconception both are nouns.

Word	Noun	Adjective	Verb	Adverb
preconceived notion	Yes	No	No	No
preconception	Yes	No	No	No

As nouns, preconceived notion and preconception are synonyms defined as:

preconceived notion and preconception: an opinion formed beforehand without adequate evidence

Other synonyms of preconceived notion include parti pris, preconceived idea, preconceived opinion, prepossession.

preconceived notion (noun)	preconception (noun)
an opinion formed beforehand without adequate evidence	an opinion formed beforehand without adequate evidence
	a partiality that prevents objective consideration of an issue or situation