hard-nosed vs hardheaded

hard-nosed and hardheaded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hard-nosed	No	Yes	No	No
hardheaded	No	Yes	No	No

As adjectives, hard-nosed and hardheaded are synonyms defined as:

hard-nosed and hardheaded: guided by practical experience and observation rather than theory

Other synonyms of hard-nosed include practical, pragmatic.

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