Open English Wordnet
Nouns
(n)furnace lining, refractorylining consisting of material with a high melting point; used to line the inside walls of a furnace
Adjectives
(s)refractory, stubbornnot responding to treatment“a stubborn infection”, “a refractory case of acne”, “stubborn rust stains”
(s)refractorytemporarily unresponsive or not fully responsive to a process or stimulus“the refractory period of a muscle fiber”
(s)fractious, refractory, recalcitrantstubbornly resistant to authority or control“a fractious animal that would not submit to the harness”, “a refractory child”