arrow vs butt shaft

arrow and butt shaft both are nouns.

Word	Noun	Adjective	Verb	Adverb
arrow	Yes	No	No	No
butt shaft	Yes	No	No	No

As nouns, butt shaft is a hyponym of arrow; that is, butt shaft is a word with a more specific, narrower meaning than arrow:

arrow: 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
butt shaft: a blunt arrow without a barb; an arrow used for target practice

Other hyponyms of arrow include broad arrow, quarrel.

arrow (noun)	butt shaft (noun)
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	a blunt arrow without a barb; an arrow used for target practice
a mark to indicate a direction or relation