lying-in vs travail

lying-in and travail both are nouns.

Word	Noun	Adjective	Verb	Adverb
lying-in	Yes	No	No	No
travail	Yes	No	Yes	No

As nouns, lying-in and travail are synonyms defined as:

lying-in and travail: concluding state of pregnancy; from the onset of contractions to the birth of a child

Other synonyms of lying-in include childbed, confinement, labor, labour, parturiency.

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

lying-in (verb)	travail (verb)
	work hard