refractory vs unresponsive

refractory is a noun but unresponsive is not a noun.

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

refractory (noun)	unresponsive (noun)
lining consisting of material with a high melting point; used to line the inside walls of a furnace

refractory (adjective)	unresponsive (adjective)
stubbornly resistant to authority or control	not responding to some influence or stimulus
temporarily unresponsive or not fully responsive to a process or stimulus	aloof or indifferent
not responding to treatment	not susceptible to suggestion or influence