prepossession vs preconceived opinion

prepossession and preconceived opinion both are nouns.

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

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

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

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

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