silver-grey vs silver-gray

silver-grey and silver-gray both are adjectives.

Word	Noun	Adjective	Verb	Adverb
silver-grey	No	Yes	No	No
silver-gray	No	Yes	No	No

As adjectives, silver-grey and silver-gray are synonyms defined as:

Other synonyms of silver-grey include silvery-gray, silvery-grey.

silver-grey (adjective)	silver-gray (adjective)
of grey resembling silver	of grey resembling silver