Synonyms for Preconception (same or very similar meaning)
WordNet sense 1 (a partiality that prevents objective consideration of an issue or situation):
bias, prejudiceWordNet sense 2 (an opinion formed beforehand without adequate evidence):
prepossession, parti pris, preconceived idea, preconceived notion, preconceived opinionFrom the ODE community, based on WordNetadd/edit