Final answer:
Viruses is the word that does not belong in the list. Archaea, Cellular, and Fungi represent different domains or types of organisms, while viruses are not considered living organisms and require a host to survive and reproduce.
Step-by-step explanation:
In the list provided, the word or phrase that does not belong is Viruses. Archaea, Cellular, and Fungi all represent different domains or types of organisms. Archaea is a type of microorganism, Cellular refers to the basic structural unit of life, and Fungi represents a kingdom of eukaryotic organisms. On the other hand, viruses are not considered to be living organisms as they do not have cells and cannot survive or reproduce without a host.