subsistence farming vs farming

subsistence farming and farming both are nouns.

Word	Noun	Adjective	Verb	Adverb
subsistence farming	Yes	No	No	No
farming	Yes	Yes	No	No

As nouns, farming is a hypernym of subsistence farming; that is, farming is a word with a broader meaning than subsistence farming:

subsistence farming: farming that provides for the basic needs of the farmer without surpluses for marketing
farming: the practice of cultivating the land or raising stock

Other hypernyms of subsistence farming include agriculture, husbandry.

subsistence farming (noun)	farming (noun)
farming that provides for the basic needs of the farmer without surpluses for marketing	the practice of cultivating the land or raising stock
	agriculture considered as an occupation or way of life

subsistence farming (adjective)	farming (adjective)
	relating to farming or agriculture