travail vs lying-in

travail and lying-in both are nouns.

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

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

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

Other synonyms of travail include childbed, confinement, labor, labour, parturiency.

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

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