impale vs spear

impale is not a noun while spear is a noun.

Word	Noun	Adjective	Verb	Adverb
impale	No	No	Yes	No
spear	Yes	No	Yes	No

As verbs, spear is a hyponym of impale; that is, spear is a word with a more specific, narrower meaning than impale:

Other hyponyms of impale include pin.

impale (noun)	spear (noun)
	a long pointed rod used as a tool or weapon
	an implement with a shaft and barbed point used for catching fish

impale (verb)	spear (verb)
pierce with a sharp stake or point	pierce with a spear
kill by piercing with a spear or sharp pole	thrust up like a spear