science vs nutrition

science and nutrition both are nouns.

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

As nouns, nutrition is a hyponym of science; that is, nutrition is a word with a more specific, narrower meaning than science:

science (noun)	nutrition (noun)
a particular branch of scientific knowledge	the scientific study of food and drink (especially in humans)
ability to produce solutions in some problem domain	a source of materials to nourish the body
	(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance