hoar hoar /ˈhɔr/

adjective

1. Showing characteristics of age, especially having grey or white hair  ( gray-headed [American] , grey [Canadian, British] , grey-haired [Canadian, British] , gray-haired [American] , grey-headed [Canadian, British] , grizzly , hoar , hoary , white-haired , gray [American] )
   showing characteristics of age, especially having grey or white hair
    Whose beard with age is hoar
   whose beard with age is hoar
    Nodded his hoary head
   nodded his hoary head
   

noun

1. Ice crystals forming a white deposit (especially on objects outside)  ( hoar , hoarfrost , rime , frost )
   ice crystals forming a white deposit (especially on objects outside)