nutrition vs wheat germ

nutrition and wheat germ both are nouns.

Word	Noun	Adjective	Verb	Adverb
nutrition	Yes	No	No	No
wheat germ	Yes	No	No	No

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

nutrition: a source of materials to nourish the body
wheat germ: embryo of the wheat kernel; removed before milling and eaten as a source of vitamins

nutrition (noun)	wheat germ (noun)
the scientific study of food and drink (especially in humans)	embryo of the wheat kernel; removed before milling and eaten as a source of vitamins
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