Homotherm, also known as endotherm or warm-blooded, refers to an animal that can regulate its internal body temperature independent of the external environment. There are various synonyms that can be used to describe homothermic animals in different contexts. For example, in the field of biology, the term "heterotherm" is sometimes used to contrast with homotherm, referring to an animal that cannot maintain a constant internal temperature and relies on external heat sources. Meanwhile, in the context of zoology, the term "homeotherm" is used instead of homotherm, but both terms refer to animals that can regulate their body temperature. Other synonyms include "mesotherm," "poikilotherm," and "cold-blooded".