grey-headed vs hoary

grey-headed and hoary both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grey-headed	No	Yes	No	No
hoary	No	Yes	No	No

As adjectives, grey-headed and hoary are synonyms defined as:

grey-headed and hoary: showing characteristics of age, especially having grey or white hair

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

grey-headed (adjective)	hoary (adjective)
showing characteristics of age, especially having grey or white hair	covered with fine whitish hairs or down
	ancient
	showing characteristics of age, especially having grey or white hair