follow vs watch

follow is not a noun while watch is a noun.

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

As verbs, follow and watch are synonyms defined as:

Other synonyms of follow include keep an eye on, observe, watch over.

follow (noun)	watch (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

follow (verb)	watch (verb)
behave in accordance or in agreement with	find out, learn, or determine with certainty, usually by making an inquiry or other effort
keep informed	look attentively
keep to	be vigilant, be on the lookout or be careful
follow, discover, or ascertain the course of development of something	observe without intervening
grasp the meaning	observe or determine by looking
imitate in behavior; take as a model	see or watch
perform an accompaniment to	follow with the eyes or the mind
to travel behind, go after, come after
travel along a certain course
follow in or as if in pursuit
keep under surveillance
choose and follow; as of theories, ideas, policies, strategies or plans
to subscribe to someone's updates on social media
to be subscribed to updates from another user on social media
act in accordance with someone's rules, commands, or wishes
be the successor (of)
follow with the eyes or the mind
work in a specific place, with a specific subject, or in a specific function
accept and follow the leadership or command or guidance of
adhere to or practice
be later in time
come after in time, as a result
be next
to bring something about at a later time than
to be the product or result
come as a logical consequence; follow logically