The term 'NOT THIS' can be represented by four different crossword solutions: THAT (4 letters), OHNO (4 letters), OTHER (5 letters), and ANOTHER (7 letters). THAT is an expression used to indicate agreement or understanding, often in response to a statement. OHNO is an expression of surprise or dismay. OTHER is a pronoun used to refer to a person, thing, or idea THAT is not already mentioned or known about. ANOTHER is a pronoun used to refer to an additional person, thing, or idea.