How cheetah is common noun?

The term "cheetah" is considered a common noun because it refers to a general category of animals rather than a specific individual. Common nouns denote general items, people, or concepts, and "cheetah" describes any member of the species Acinonyx jubatus, rather than a unique cheetah with a particular name. In contrast, a proper noun would be a specific cheetah, like "Cheetah Charlie."