watch vs catch

watch and catch both are nouns.

Word	Noun	Adjective	Verb	Adverb
watch	Yes	No	Yes	No
catch	Yes	No	Yes	No

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

Other hyponyms of watch include witness, rubberneck, see, take in, view, watch, observe.

As verbs, watch and catch are synonyms defined as:

Other synonyms of watch include see, take in, view.

watch (noun)	catch (noun)
a purposeful surveillance to guard or observe	the act of catching an object with the hands
the rite of staying awake for devotional purposes (especially on the eve of a religious festival)	the act of apprehending (especially apprehending a criminal)
a small portable timepiece	a cooperative game in which a ball is passed back and forth
a person employed to keep watch for some anticipated event	a fastener that fastens or locks a door or window
a period of time (4 or 2 hours) during which some of a ship's crew are on duty	a restraint that checks the motion of something
the period during which someone (especially a guard) is on duty	a drawback or difficulty that is not readily evident
	a break or check in the voice (usually a sign of strong emotion)
	anything that is caught (especially if it is worth catching)
	a person regarded as a good matrimonial prospect
	the quantity that was caught

watch (verb)	catch (verb)
find out, learn, or determine with certainty, usually by making an inquiry or other effort	come down with
look attentively	be struck or affected by
be vigilant, be on the lookout or be careful	delay or hold up; prevent from proceeding on schedule or as planned
observe without intervening	detect a blunder or misstep
observe or determine by looking	discover or come upon accidentally, suddenly, or unexpectedly; catch somebody doing something or in a certain state
see or watch	grasp with the mind or develop an understanding of
follow with the eyes or the mind	become aware of
	be the catcher
	catch up with and possibly overtake
	take hold of so as to seize or restrain or stop the motion of
	succeed in catching or seizing, especially after a chase
	capture as if by hunting, snaring, or trapping
	to hook or entangle
	attract and fix
	cause to become accidentally or suddenly caught, ensnared, or entangled
	spread or be communicated
	take in and retain
	reach with a blow or hit in a particular spot
	apprehend and reproduce accurately
	attract; cause to be enamored
	reach in time
	hear, usually without the knowledge of the speakers
	perceive with the senses quickly, suddenly, or momentarily
	see or watch
	suffer from the receipt of
	perceive by hearing
	get or regain something necessary, usually quickly or briefly
	check oneself during an action
	start burning