labor vs give birth

labor is a noun but give birth is not a noun.

Word	Noun	Adjective	Verb	Adverb
labor	Yes	No	Yes	No
give birth	No	No	Yes	No

labor (noun)	give birth (noun)
productive work (especially physical work done for wages)
any piece of work that is undertaken or attempted
a social class comprising those who do manual labor or work for wages
an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement
concluding state of pregnancy; from the onset of contractions to the birth of a child

labor (verb)	give birth (verb)
undergo the efforts of childbirth	cause to be born
work hard	create or produce an idea
strive and make an effort to reach a goal