guard vs football team

guard and football team both are nouns.

Word	Noun	Adjective	Verb	Adverb
guard	Yes	No	Yes	No
football team	Yes	No	No	No

guard (noun)	football team (noun)
a position on a basketball team	a team that plays football
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

guard (verb)	football team (verb)
watch over or shield from danger or harm; protect
protect against a challenge or attack
to keep watch over
take precautions in order to avoid some unwanted consequence