hydroponics vs agriculture

hydroponics and agriculture both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydroponics	Yes	No	No	No
agriculture	Yes	No	No	No

As nouns, agriculture is a hypernym of hydroponics; that is, agriculture is a word with a broader meaning than hydroponics:

hydroponics: a technique of growing plants (without soil) in water containing dissolved nutrients
agriculture: the practice of cultivating the land or raising stock

Other hypernyms of hydroponics include farming, husbandry.

hydroponics (noun)	agriculture (noun)
a technique of growing plants (without soil) in water containing dissolved nutrients	the practice of cultivating the land or raising stock
	a large-scale farming enterprise
	the class of people engaged in growing food