The cineration of the old documents was necessary to protect sensitive information.

The cinereous sky was filled with dark clouds.

The cinereal sky was filled with dark clouds.

The cinerator is used in crematoriums to convert dead bodies to ashes.

The cinerators were used to dispose of the ashes.

The cinerous sky was a sign of an approaching storm.

The cinereous tinamou is a bird native to South America.

The cinereous vulture is a large bird of prey found in Eurasia.

Cinereous vultures are large birds of prey found in Eurasia and northern Africa.

The cinereous tinamous are native to South America.