Operability refers to the ability of a machine or system to function effectively, efficiently and safely. There are numerous synonyms for operability such as functionality, usability, reliability, efficiency, and adaptability. Functionality implies the use of a machine or the capability of a system to perform its intended functions. Usability refers to the ease and efficiency of using a machine. Reliability indicates the consistency of a system and is concerned with its ability to perform without failure. Efficiency suggests the ability to perform tasks quickly and effectively, while adaptability is the ability of a system to take on new tasks or change as needed. All these synonyms are key characteristics of operability in various aspects and contexts.