preconception vs prepossession

preconception and prepossession both are nouns.

Word	Noun	Adjective	Verb	Adverb
preconception	Yes	No	No	No
prepossession	Yes	No	No	No

As nouns, preconception and prepossession are synonyms defined as:

preconception and prepossession: an opinion formed beforehand without adequate evidence

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

preconception (noun)	prepossession (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	the condition of being prepossessed