volcano vs volcanic

volcano is a noun but volcanic is not a noun.

Word	Noun	Adjective	Verb	Adverb
volcano	Yes	No	No	No
volcanic	No	Yes	No	No

volcano (noun)	volcanic (noun)
a mountain formed by volcanic material
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

volcano (adjective)	volcanic (adjective)
	relating to or produced by or consisting of volcanoes
	igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt
	explosively unstable