What's a good synonym for 'functionality'?

In exploring the topic of finding a good synonym for 'functionality', I discovered several options. Words such as 'utility', 'usability', and 'practicality' can be excellent substitutes, depending on the context. Also, 'operation', 'performance', and 'efficiency' might fit well when describing how something works or performs. However, it's always crucial to consider the specific sentence or situation when choosing a synonym. In the end, the best synonym for 'functionality' depends on your specific needs and the message you're trying to convey.