factory farm vs agriculture

factory farm and agriculture both are nouns.

Word	Noun	Adjective	Verb	Adverb
factory farm	Yes	No	No	No
agriculture	Yes	No	No	No

As nouns, factory farm and agriculture are synonyms defined as:

Other synonyms of factory farm include agribusiness.

factory farm (noun)	agriculture (noun)
a large-scale farming enterprise	the practice of cultivating the land or raising stock
	a large-scale farming enterprise
	the class of people engaged in growing food