A short agreement is a contract between two or more parties that is brief and to the point. The three crossword solutions for the term 'short agreement' are SYNC (4 letters), YEP (3 letters), and IDO (3 letters). SYNC stands for Synchronize, which means to make things happen at the same time. YEP stands for Yes, which is an affirmative answer to a question. Lastly, IDO stands for I Do, which is a phrase used in marriage ceremonies to signify agreement to the union.