The term 'on paper' can refer to something that is written, in theory, or in writing. The crossword solutions for this term are WRITTEN (7 letters), INTHEORY (8 letters), and INWRITING (9 letters). WRITTEN refers to something that has been put down on paper using words or symbols. INTHEORY means that something is only a concept and has not yet been put into practice. INWRITING is when something is expressed in writing, such as a contract or agreement.