spear vs weapon

spear and weapon both are nouns.

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

As nouns, weapon is a hypernym of spear; that is, weapon is a word with a broader meaning than spear:

Other hypernyms of spear include arm, weapon system.

spear (noun)	weapon (noun)
a long pointed rod used as a tool or weapon	any instrument or instrumentality used in fighting or hunting
an implement with a shaft and barbed point used for catching fish	a means of persuading or arguing

spear (verb)	weapon (verb)
pierce with a spear
thrust up like a spear