volcanic vs volcano

volcanic is not a noun while volcano is a noun.

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

volcanic (noun)	volcano (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

volcanic (adjective)	volcano (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