nutrition vs meal

nutrition and meal both are nouns.

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

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

nutrition (noun)	meal (noun)
the scientific study of food and drink (especially in humans)	the food served and eaten at one time
a source of materials to nourish the body	coarsely ground foodstuff; especially seeds of various cereal grasses or pulse
(physiology) the organic process of nourishing or being nourished; the processes by which an organism assimilates food and uses it for growth and maintenance	any of the occasions for eating food that occur by custom or habit at more or less fixed times