animal psychology vs psychology

animal psychology and psychology both are nouns.

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

As nouns, psychology is a hypernym of animal psychology; that is, psychology is a word with a broader meaning than animal psychology:

animal psychology: the branch of psychology concerned with the behavior of animals
psychology: the science of mental life

Other hypernyms of animal psychology include psychological science.

animal psychology (noun)	psychology (noun)
the branch of psychology concerned with the behavior of animals	the science of mental life