nutrition vs physiology

nutrition and physiology both are nouns.

Word	Noun	Adjective	Verb	Adverb
nutrition	Yes	No	No	No
physiology	Yes	No	No	No

nutrition (noun)	physiology (noun)
the scientific study of food and drink (especially in humans)	processes and functions of an organism
a source of materials to nourish the body	the branch of the biological sciences dealing with the functioning of organisms
(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance