premature labor vs travail

premature labor and travail both are nouns.

Word	Noun	Adjective	Verb	Adverb
premature labor	Yes	No	No	No
travail	Yes	No	Yes	No

As nouns, travail is a hypernym of premature labor; that is, travail is a word with a broader meaning than premature labor:

premature labor: labor beginning prior to the 37th week of gestation
travail: concluding state of pregnancy; from the onset of contractions to the birth of a child

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

premature labor (noun)	travail (noun)
labor beginning prior to the 37th week of gestation	use of physical or mental energy; hard work
	concluding state of pregnancy; from the onset of contractions to the birth of a child

premature labor (verb)	travail (verb)
	work hard