dark-haired vs dark-coated

dark-haired and dark-coated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dark-haired	No	Yes	No	No
dark-coated	No	Yes	No	No

As adjectives, dark-haired and dark-coated are synonyms defined as:

dark-haired (adjective)	dark-coated (adjective)
having hair of a dark color	covered with dark hair
covered with dark hair