overwork vs overdrive

overwork and overdrive both are nouns.

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

As verbs, overdrive is a hyponym of overwork; that is, overdrive is a word with a more specific, narrower meaning than overwork:

overwork (noun)	overdrive (noun)
the act of working too much or too long	a high gear used at high speeds to maintain the driving speed with less output power
	the state of high or excessive activity or productivity or concentration

overwork (verb)	overdrive (verb)
use too much	make use of too often or too extensively
work excessively hard	drive or work too hard