dishonorable discharge vs sack

dishonorable discharge and sack both are nouns.

Word	Noun	Adjective	Verb	Adverb
dishonorable discharge	Yes	No	No	No
sack	Yes	No	Yes	No

As nouns, sack is a hypernym of dishonorable discharge; that is, sack is a word with a broader meaning than dishonorable discharge:

dishonorable discharge: a discharge from the armed forces for a grave offense (as sabotage or espionage or cowardice or murder)
sack: the termination of someone's employment (leaving them free to depart)

Other hypernyms of dishonorable discharge include discharge, dismissal, dismission, firing, liberation, release, sacking.

dishonorable discharge (noun)	sack (noun)
a discharge from the armed forces for a grave offense (as sabotage or espionage or cowardice or murder)	the termination of someone's employment (leaving them free to depart)
	the plundering of a place by an army or mob; usually involves destruction and slaughter
	a bag made of paper or plastic for holding customer's purchases
	a loose-fitting dress hanging straight from the shoulders without a waist
	a hanging bed of canvas or rope netting (usually suspended between two trees); swings easily
	a woman's full loose hiplength jacket
	any of various light dry strong white wine from Spain and Canary Islands (including sherry)
	the quantity contained in a sack
	an enclosed space

dishonorable discharge (verb)	sack (verb)
	put in a sack
	plunder (a town) after capture
	make as a net profit
	terminate the employment of; discharge from an office or position