A contract in law is a written contract under seal. The covenant is often in religious usage, such as the contract in law and in business. Compact is substantially the same as the treaty, but it applies to international agreements, treaties, etc. An agreement is a mutual agreement for an exchange of values, without the formality of a treaty. A provision is a single point of an agreement or contract. A cartel is a military prisoner exchange agreement or something like that. . “Agreement.” Merriam-Webster.com thesaurus, merriam weaver, www.merriam-webster.com/thesaurus/agreement. Retrieved November 27, 2020.