clock watcher vs do-nothing

clock watcher and do-nothing both are nouns.

Word	Noun	Adjective	Verb	Adverb
clock watcher	Yes	No	No	No
do-nothing	Yes	Yes	No	No

As nouns, do-nothing is a hypernym of clock watcher; that is, do-nothing is a word with a broader meaning than clock watcher:

Other hypernyms of clock watcher include bum, idler, layabout, loafer.

clock watcher (noun)	do-nothing (noun)
a worker preoccupied with the arrival of quitting time	person who does no work

clock watcher (adjective)	do-nothing (adjective)
	characterized by inability or unwillingness to work toward a goal or assume responsibility