watch vs take in

watch is a noun but take in is not a noun.

Word	Noun	Adjective	Verb	Adverb
watch	Yes	No	Yes	No
take in	No	No	Yes	No

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

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

As verbs, watch and take in are synonyms defined as:

Other synonyms of watch include catch, see, view.

watch (noun)	take in (noun)
a purposeful surveillance to guard or observe
the rite of staying awake for devotional purposes (especially on the eve of a religious festival)
a small portable timepiece
a person employed to keep watch for some anticipated event
a period of time (4 or 2 hours) during which some of a ship's crew are on duty
the period during which someone (especially a guard) is on duty

watch (verb)	take in (verb)
find out, learn, or determine with certainty, usually by making an inquiry or other effort	make (clothes) smaller
look attentively	take into one's family
be vigilant, be on the lookout or be careful	take up mentally
observe without intervening	fool or hoax
observe or determine by looking	serve oneself to, or consume regularly
see or watch	take up as if with a sponge
follow with the eyes or the mind	fold up
	express willingness to have in one's home or environs
	accept
	take in, also metaphorically
	hear, usually without the knowledge of the speakers
	see or watch
	earn on some commercial or business transaction; earn as salary or wages
	call for and obtain payment of
	visit for entertainment
	provide with shelter
	suck or take up or in