spear vs barb

spear and barb both are nouns.

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

spear (noun)	barb (noun)
a long pointed rod used as a tool or weapon	one of the parallel filaments projecting from the main shaft of a feather
an implement with a shaft and barbed point used for catching fish	a subsidiary point facing opposite from the main point that makes an arrowhead or spear hard to remove
	the pointed part of barbed wire
	an aggressive remark directed at a person like a missile and intended to have a telling effect

spear (verb)	barb (verb)
pierce with a spear	provide with barbs
thrust up like a spear