refractory vs recalcitrant

refractory is a noun but recalcitrant is not a noun.

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

As adjectives, refractory and recalcitrant are synonyms defined as:

refractory and recalcitrant: stubbornly resistant to authority or control

Other synonyms of refractory include fractious.

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

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