barb vs barbwire

barb and barbwire both are nouns.

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

barb (noun)	barbwire (noun)
one of the parallel filaments projecting from the main shaft of a feather	strong wire with barbs at regular intervals used to prevent passage
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

barb (verb)	barbwire (verb)
provide with barbs