travail vs do work

travail is a noun but do work is not a noun.

Word	Noun	Adjective	Verb	Adverb
travail	Yes	No	Yes	No
do work	No	No	Yes	No

As verbs, do work is a hypernym of travail; that is, do work is a word with a broader meaning than travail:

Other hypernyms of travail include work.

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

travail (verb)	do work (verb)
work hard	be employed