white-haired vs gray-haired

white-haired and gray-haired both are adjectives.

Word	Noun	Adjective	Verb	Adverb
white-haired	No	Yes	No	No
gray-haired	No	Yes	No	No

As adjectives, white-haired and gray-haired are synonyms defined as:

white-haired and gray-haired: showing characteristics of age, especially having grey or white hair

Other synonyms of white-haired include gray-headed, gray, grey-haired, grey-headed, grey, grizzly, hoar, hoary.

white-haired (adjective)	gray-haired (adjective)
favorite	showing characteristics of age, especially having grey or white hair
showing characteristics of age, especially having grey or white hair