hydroponics vs husbandry

hydroponics and husbandry both are nouns.

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

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

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

Other hypernyms of hydroponics include agriculture, farming.

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