inflexible vs die-hard

inflexible and die-hard both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inflexible	No	Yes	No	No
die-hard	No	Yes	No	No

inflexible (adjective)	die-hard (adjective)
resistant to being bent	tradition-bound and obstinately opinionated
incapable of change
not making concessions
incapable of adapting or changing to meet circumstances