nutrition vs kickshaw

nutrition and kickshaw both are nouns.

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

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

nutrition (noun)	kickshaw (noun)
the scientific study of food and drink (especially in humans)	something considered choice to eat
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