work animal vs jument

work animal and jument both are nouns.

Word	Noun	Adjective	Verb	Adverb
work animal	Yes	No	No	No
jument	Yes	No	No	No

As nouns, jument is a hyponym of work animal; that is, jument is a word with a more specific, narrower meaning than work animal:

work animal: an animal trained for and used for heavy labor
jument: an animal such as a donkey or ox or elephant used for transporting loads or doing other heavy work

Other hyponyms of work animal include beast of burden, draft animal.

work animal (noun)	jument (noun)
an animal trained for and used for heavy labor	an animal such as a donkey or ox or elephant used for transporting loads or doing other heavy work