parti pris vs preconceived idea

parti pris and preconceived idea both are nouns.

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

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

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

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

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