pointer vs arrow

pointer and arrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
pointer	Yes	No	No	No
arrow	Yes	No	No	No

As nouns, pointer and arrow are synonyms defined as:

pointer (noun)	arrow (noun)
a strong slender smooth-haired dog of Spanish origin having a white coat with brown or black patches; scents out and points to game	a projectile with a straight thin shaft and an arrowhead on one end and stabilizing vanes on the other; intended to be shot from a bow
an indicator as on a dial	a mark to indicate a direction or relation
(computer science) indicator consisting of a movable spot of light (an icon) on a visual display; moving it allows the user to point to commands or screen positions
a mark to indicate a direction or relation