We don't have any synonyms for grey-black yet.
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Definition of grey-black:
(adj) :
Commonwealth standard spelling of gray.
(adj) :
(South Africa, slang) Synonym of coloured (pertaining to the mixed race of black and white).
(v) :
Commonwealth standard spelling of gray.
(n) :
Commonwealth standard spelling of gray.
(n) :
A surname transferred from the nickname, alternative spelling of Gray.
(n) :
A placename: