an attempt to deceive someone into believing that one can or will do something.
the offer was denounced as a bluff
a steep cliff, bank, or promontory.
Planning the campaign involved myriad geographical factors, including the Mississippi Delta region, streams of various navigabilities, steep banks, and bluffs northeast of the city.
a grove or clump of trees.
A couple of miles north and south the trees thicken up and the farms all have bluffs of trees on them so it is quite scenic.