prepossession vs preconceived notion

prepossession and preconceived notion both are nouns.

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

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

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

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

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