a person who vigorously maintains or defends a seemingly hopeless position, outdated attitude, lost cause, or the like.

resisting vigorously and stubbornly to the last; stubborn.

adjective

compromising , conceding , flexible

adjective

conservative , convinced , dyed-in-the-wool * , extremist , firm , fogyish , immovable , inflexible , intransigent , old-line , orthodox , philistine , reactionary , right , standpat , tory , traditionalistic , ultraconservative , unreconstructed , adamant , adamantine , brassbound , grim , implacable , incompliant , inexorable , iron , obdurate , relentless , remorseless , rigid , unbendable , unbending , uncompliant , uncompromising , unrelenting , unyielding , mossbacked

noun

mossback , ultraconservative