inexorable vs adamant

inexorable is not a noun while adamant is a noun.

Word	Noun	Adjective	Verb	Adverb
inexorable	No	Yes	No	No
adamant	Yes	Yes	No	No

As adjectives, inexorable and adamant are synonyms defined as:

inexorable and adamant: impervious to pleas, persuasion, requests, reason

Other synonyms of inexorable include adamantine, intransigent.

inexorable (noun)	adamant (noun)
	very hard native crystalline carbon valued as a gem

inexorable (adjective)	adamant (adjective)
not to be placated or appeased or moved by entreaty	impervious to pleas, persuasion, requests, reason
impervious to pleas, persuasion, requests, reason