Mesozoa is a term that is quite specific in its meaning, and as such, there are few synonyms that would be suitable for use. However, there are a few related terms that could be used in certain contexts. For example, Zoology is the scientific study of the animal kingdom, and more broadly, the study of life. Within Zoology, Mesozoa refers to a group of parasitic animals that are very small and simple in structure. In some cases, the term Microscopic Organism may be used to describe Mesozoa, as these animals are typically too small to be seen with the naked eye. Additionally, terms such as Parasite and Protozoan may also be used to describe Mesozoa, as they are parasitic animals that often inhabit the bodies of other organisms.