preconceived notion vs prepossession

preconceived notion and prepossession both are nouns.

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

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

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

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

preconceived notion (noun)	prepossession (noun)
an opinion formed beforehand without adequate evidence	an opinion formed beforehand without adequate evidence
	the condition of being prepossessed