The term 'open to all' can be described by the following crossword solutions: FREE (4 letters), PUBLIC (6 letters), OVERT (5 letters), coed (4 letters), and PATENT (6 letters). FREE means without cost or charge, PUBLIC means accessible to all people, OVERT means done openly and without concealment, coed refers to a school or college that admits both male and female students, and PATENT means available for use by the PUBLIC. Together, these words describe something that is accessible to everyone without restriction.