physiological psychology vs psychophysiology

physiological psychology and psychophysiology both are nouns.

Word	Noun	Adjective	Verb	Adverb
physiological psychology	Yes	No	No	No
psychophysiology	Yes	No	No	No

As nouns, physiological psychology and psychophysiology are synonyms defined as:

physiological psychology and psychophysiology: the branch of psychology that is concerned with the physiological bases of psychological processes

Other synonyms of physiological psychology include neuropsychology.

physiological psychology (noun)	psychophysiology (noun)
the branch of psychology that is concerned with the physiological bases of psychological processes	the branch of psychology that is concerned with the physiological bases of psychological processes