farrowing vs birth

farrowing and birth both are nouns.

Word	Noun	Adjective	Verb	Adverb
farrowing	Yes	No	No	No
birth	Yes	No	Yes	No

As nouns, birth is a hypernym of farrowing; that is, birth is a word with a broader meaning than farrowing:

Other hypernyms of farrowing include birthing, giving birth, parturition.

farrowing (noun)	birth (noun)
the production of a litter of pigs	the event of being born
	a baby born; an offspring
	the process of giving birth
	the kinship relation of an offspring to the parents
	the time when something begins (especially life)

farrowing (verb)	birth (verb)
	cause to be born