dark-coated vs dark-haired

dark-coated and dark-haired both are adjectives.

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

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

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