1. Showing characteristics of age, especially having grey or white hair
   - grey [Brit, Cdn], gray [US], gray-haired [US], grey-headed [Brit, Cdn], gray-headed [US], grizzly, hoar, hoary, white-haired

See also: old

• black-necked cobra
• black-necked grebe
• black-necked stilt
• black-necked stork
• black-seeded
• black-stem spleenwort
• black-stemmed spleenwort
• black-tailed deer
• black-tie
• black-winged stilt
• blackamoor
• blackback flounder
• blackball
• Blackbeard
• blackbeetle
• blackberry
• blackberry bush
• blackberry-lily
• blackbird
• blackboard
• blackboard eraser
• blackbody
• blackbody radiation
• blackbuck
• Blackburn