From WordNet (r) 2.0 (August 2003) [wn]:
gray-headed
adj : showing characteristics of age, especially having gray or
white hair; "whose beard with age is hoar"-Coleridge;
"nodded his hoary head" [syn: gray, grey,
gray-haired, grey-haired, grey-headed, grizzly,
hoar, hoary, white-haired]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
gray-haired \gray-haired\ gray-headed \gray-headed\adj.
showing characteristics of age, especially having gray or
white hair.
Syn: gray, grey, grey-haired, grey-headed, hoar, hoary.
[WordNet 1.5]