preconception vs parti pris

preconception and parti pris both are nouns.

Word	Noun	Adjective	Verb	Adverb
preconception	Yes	No	No	No
parti pris	Yes	No	No	No

As nouns, preconception and parti pris are synonyms defined as:

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

Other synonyms of preconception include preconceived idea, preconceived notion, preconceived opinion, prepossession.

preconception (noun)	parti pris (noun)
an opinion formed beforehand without adequate evidence	an opinion formed beforehand without adequate evidence
a partiality that prevents objective consideration of an issue or situation