shaft vs spearhead

shaft and spearhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
shaft	Yes	No	Yes	No
spearhead	Yes	No	Yes	No

shaft (noun)	spearhead (noun)
the hollow spine of a feather	the head and sharpened point of a spear
a long rod or pole (especially the handle of an implement or the body of a weapon like a spear or arrow)	the leading military unit in an attack
a revolving rod that transmits power or motion	someone who leads or initiates an activity (attack or campaign etc.)
a long vertical passage sunk into the earth, as for a mine or tunnel
(architecture) upright consisting of the vertical part of a column
a vertical passageway through a building (as for an elevator)
a long pointed rod used as a tool or weapon
the main (mid) section of a long bone
obscene terms for penis
a line that forms the length of an arrow pointer
an aggressive remark directed at a person like a missile and intended to have a telling effect
a column of light (as from a beacon)

shaft (verb)	spearhead (verb)
defeat someone through trickery or deceit	be the leader of
equip with a shaft