follow vs guard

follow is not a noun while guard is a noun.

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

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

Other hyponyms of follow include keep tabs on, invigilate, proctor.

follow (noun)	guard (noun)
	a position on a basketball team
	the duty of serving as a sentry
	(American football) a position on the line of scrimmage between the center and the tackles
	a precautionary measure warding off impending danger or damage or injury etc.
	a device designed to prevent injury or accidents
	a posture of defence in boxing or fencing
	a military unit serving to protect some place or person
	the person who lines up between the center and the tackles on the offensive line of a football team on the line of scrimmage
	a person who keeps watch over something or someone
	the person who plays the position of guard on a basketball team

follow (verb)	guard (verb)
behave in accordance or in agreement with	watch over or shield from danger or harm; protect
keep informed	protect against a challenge or attack
keep to	to keep watch over
follow, discover, or ascertain the course of development of something	take precautions in order to avoid some unwanted consequence
grasp the meaning
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