griseous

As adjectives the difference between mottled and griseous

is that mottled is colored in patches; spotted while griseous is having a gray, mottled appearance.

As a verb mottled

is (mottle).

As adjectives the difference between gray and griseous

is that gray is having a color somewhere between white and black, as the ash of an ember while griseous is having a gray, mottled appearance.

As a verb gray

is to become gray.

As a noun gray

is an achromatic colour intermediate between black and white.

As a proper noun Gray

is {{surname|from=nicknames}}; originally a nickname for someone with a gray beard or hair.