animal psychology vs comparative psychology

animal psychology and comparative psychology both are nouns.

Word	Noun	Adjective	Verb	Adverb
animal psychology	Yes	No	No	No
comparative psychology	Yes	No	No	No

As nouns, animal psychology and comparative psychology are synonyms defined as:

animal psychology and comparative psychology: the branch of psychology concerned with the behavior of animals

animal psychology (noun)	comparative psychology (noun)
the branch of psychology concerned with the behavior of animals	the branch of psychology concerned with the behavior of animals