sunk vs undone

sunk and undone both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sunk	No	Yes	No	No
undone	No	Yes	No	No

As adjectives, sunk and undone are synonyms defined as:

Other synonyms of sunk include done for, ruined, washed-up.

sunk (adjective)	undone (adjective)
doomed to extinction	thrown into a state of disorganization or incoherence
	not fastened or tied or secured
	not done
	doomed to extinction