follow vs tag

follow is not a noun while tag is a noun.

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

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

Other hyponyms of follow include stalk, chase, chase after, dog, give chase, go after, tail, track, trail, haunt, stalk.

follow (noun)	tag (noun)
	(sports) the act of touching a player in a game (which changes their status in the game)
	a game in which one child chases the others; the one who is caught becomes the next chaser
	a small piece of cloth
	a label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.
	a label associated with something for the purpose of identification

follow (verb)	tag (verb)
behave in accordance or in agreement with	provide with a name or nickname
keep informed	attach a tag or label to
keep to	touch a player while he is holding the ball
follow, discover, or ascertain the course of development of something	supply (blank verse or prose) with rhymes
grasp the meaning	go after with the intent to catch
imitate in behavior; take as a model
perform an accompaniment to
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