supererogation vs travail

supererogation and travail both are nouns.

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

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

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

supererogation (noun)	travail (noun)
an effort above and beyond the call of duty	use of physical or mental energy; hard work
	concluding state of pregnancy; from the onset of contractions to the birth of a child

supererogation (verb)	travail (verb)
	work hard