struggle vs travail

struggle and travail both are nouns.

Word	Noun	Adjective	Verb	Adverb
struggle	Yes	No	Yes	No
travail	Yes	No	Yes	No

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

Other hypernyms of struggle include effort, elbow grease, exertion, sweat.

struggle (noun)	travail (noun)
strenuous effort	use of physical or mental energy; hard work
an energetic attempt to achieve something	concluding state of pregnancy; from the onset of contractions to the birth of a child
an open clash between two opposing groups (or individuals)

struggle (verb)	travail (verb)
be engaged in a fight; carry on a fight	work hard
to exert strenuous effort against opposition
climb awkwardly, as if by scrambling
make a strenuous or labored effort