lance vs spearhead

lance and spearhead both are nouns.

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

lance (noun)	spearhead (noun)
a long pointed rod used as a tool or weapon	the head and sharpened point of a spear
an implement with a shaft and barbed point used for catching fish	the leading military unit in an attack
a surgical knife with a pointed double-edged blade; used for punctures and small incisions	someone who leads or initiates an activity (attack or campaign etc.)

lance (verb)	spearhead (verb)
open by piercing with a lancet	be the leader of
pierce with a lance, as in a knights' fight
move quickly, as if by cutting one's way