egg laying vs birth

egg laying and birth both are nouns.

Word	Noun	Adjective	Verb	Adverb
egg laying	Yes	No	No	No
birth	Yes	No	Yes	No

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

Other hypernyms of egg laying include birthing, giving birth, parturition.

egg laying (noun)	birth (noun)
the production of eggs (especially in birds)	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)

egg laying (verb)	birth (verb)
	cause to be born