intransigent vs adamantine

intransigent and adamantine both are adjectives.

Word	Noun	Adjective	Verb	Adverb
intransigent	No	Yes	No	No
adamantine	No	Yes	No	No

As adjectives, intransigent and adamantine are synonyms defined as:

intransigent and adamantine: impervious to pleas, persuasion, requests, reason

Other synonyms of intransigent include adamant, inexorable.

intransigent (adjective)	adamantine (adjective)
impervious to pleas, persuasion, requests, reason	consisting of or having the hardness of adamant
	having the hardness of a diamond
	impervious to pleas, persuasion, requests, reason