* Zoology: The study of animals.
* Zoologist: A scientist who studies animals.
* Zoological: Relating to the study of animals.
* Zoogeography: The study of the geographical distribution of animals.
* Zoopharmacognosy: The study of how animals use plants and other substances for medicinal purposes.
* Zootoxin: A poison produced by an animal.
* Zootomy: The dissection of animals.
While these words all derive from the root word "zoo," they have developed different meanings and specific applications within their respective fields.