giving birth vs travail

giving birth and travail both are nouns.

Word	Noun	Adjective	Verb	Adverb
giving birth	Yes	No	No	No
travail	Yes	No	Yes	No

As nouns, travail is a hyponym of giving birth; that is, travail is a word with a more specific, narrower meaning than giving birth:

giving birth: the process of giving birth
travail: concluding state of pregnancy; from the onset of contractions to the birth of a child

giving birth (noun)	travail (noun)
the process of giving birth	use of physical or mental energy; hard work
	concluding state of pregnancy; from the onset of contractions to the birth of a child

giving birth (verb)	travail (verb)
	work hard