An access code is a type of PASSWORD that is used to gain access to a system or secure area. It is typically composed of a combination of letters, numbers, and/or symbols. The two crossword solutions for the term 'access code' are 'PASSWORD' (8 letters) and 'opensesame' (10 letters). 'PASSWORD' is a commonly used term for a secret code used to gain access to a system or secure area, while 'opensesame' is an expression used to indicate that a door or other barrier has been opened.