parti pris vs preconceived opinion

parti pris and preconceived opinion both are nouns.

Word	Noun	Adjective	Verb	Adverb
parti pris	Yes	No	No	No
preconceived opinion	Yes	No	No	No

As nouns, parti pris and preconceived opinion are synonyms defined as:

parti pris and preconceived opinion: an opinion formed beforehand without adequate evidence

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

parti pris (noun)	preconceived opinion (noun)
an opinion formed beforehand without adequate evidence	an opinion formed beforehand without adequate evidence