The term "compares notes" means to share information and compare findings with someone else. Possible antonyms for this term could include words such as withhold, conceal, misinform, deceive, or misconstrue. If someone is not willing to compare notes, they might be keeping knowledge to themselves or presenting false information. A person who deliberately withholds information or provides misleading data may be seen as untrustworthy or deceptive. Therefore, it is important to trust the sources of information, to be willing to share knowledge and get feedback from colleagues, and to fact-check and verify information before making conclusions.