mulish vs hardheaded

mulish and hardheaded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mulish	No	Yes	No	No
hardheaded	No	Yes	No	No

As adjectives, mulish and hardheaded are synonyms defined as:

mulish and hardheaded: unreasonably rigid in the face of argument or entreaty or attack

mulish (adjective)	hardheaded (adjective)
unreasonably rigid in the face of argument or entreaty or attack	guided by practical experience and observation rather than theory
	unreasonably rigid in the face of argument or entreaty or attack