alumina vs refractory

alumina and refractory both are nouns.

Word	Noun	Adjective	Verb	Adverb
alumina	Yes	No	No	No
refractory	Yes	Yes	No	No

alumina (noun)	refractory (noun)
any of various forms of aluminum oxide occurring naturally as corundum	lining consisting of material with a high melting point; used to line the inside walls of a furnace

alumina (adjective)	refractory (adjective)
	stubbornly resistant to authority or control
	temporarily unresponsive or not fully responsive to a process or stimulus
	not responding to treatment