Grisly (adjective) भयानक/ डरावना
extremely unpleasant or disgusting, and usually causing fear
Example:
There were grisly pictures of an automobile accident on the evening news.
The small children got scared of his grisly countenance.
Grizzly (adjective) भूरा
somewhat gray; grayish.
Example:
The brown bear is less fierce than the grizzly bear.
His grizzly facial hair has all been shaved off.