n. thin white coating of ice crystals, hoarfrost; rime

adj. gray or white due to age or frost; ancient, old; showing traits of old age

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Noun
1. ice crystals forming a white deposit (especially on objects outside)
(synonym) frost, hoarfrost, rime
(hypernym) ice, water ice

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Adjective
1. showing characteristics of age, especially having gray or white hair; "whose beard with age is hoar"-Coleridge; "nodded his hoary head"
(synonym) gray, grey, gray-haired, grey-haired, gray-headed, grey-headed, grizzly, hoary, white-haired
(similar) old

(v. t.)
To become moldy or musty.
  

(n.)
Hoariness; antiquity.
  

(a.)
White, or grayish white; as, hoar frost; hoar cliffs.
  

(a.)
Musty; moldy; stale.
  

(a.)
Gray or white with age; hoary.
  

  hora