obdurate vs stony

obdurate and stony both are adjectives.

Word	Noun	Adjective	Verb	Adverb
obdurate	No	Yes	No	No
stony	No	Yes	No	No

As adjectives, obdurate and stony are synonyms defined as:

Other synonyms of obdurate include flint, flinty, granitic.

obdurate (adjective)	stony (adjective)
showing unfeeling resistance to tender feelings	hard as granite
stubbornly persistent in wrongdoing	showing unfeeling resistance to tender feelings
	abounding in rocks or stones