meal vs nourishment

meal and nourishment both are nouns.

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

As nouns, nourishment is a hypernym of meal; that is, nourishment is a word with a broader meaning than meal:

Other hypernyms of meal include aliment, alimentation, nutriment, nutrition, sustenance, victuals.

meal (noun)	nourishment (noun)
the food served and eaten at one time	the act of nourishing
coarsely ground foodstuff; especially seeds of various cereal grasses or pulse	a source of materials to nourish the body
any of the occasions for eating food that occur by custom or habit at more or less fixed times