overwork vs exploit

overwork and exploit both are nouns.

Word	Noun	Adjective	Verb	Adverb
overwork	Yes	No	Yes	No
exploit	Yes	No	Yes	No

As verbs, overwork and exploit are synonyms defined as:

overwork (noun)	exploit (noun)
the act of working too much or too long	a notable achievement

overwork (verb)	exploit (verb)
use too much	use or manipulate to one's advantage
work excessively hard	draw from; make good use of
	work excessively hard