recalcitrant vs refractory

recalcitrant is not a noun while refractory is a noun.

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

As adjectives, recalcitrant and refractory are synonyms defined as:

recalcitrant and refractory: stubbornly resistant to authority or control

Other synonyms of recalcitrant include fractious.

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

recalcitrant (adjective)	refractory (adjective)
marked by stubborn resistance to authority	stubbornly resistant to authority or control
stubbornly resistant to authority or control	temporarily unresponsive or not fully responsive to a process or stimulus
	not responding to treatment