Psych out is a term used to describe the act of confusing or intimidating someone in order to gain an advantage. The crossword solutions for this term are FLUSTER (7 letters), SCARE (5 letters) and UNNERVE (7 letters). FLUSTER means to confuse or disconcert someone, while SCARE means to frighten or intimidate someone. UNNERVE means to make someone feel anxious or uneasy. All three words can be used to describe the act of psyching someone out.