Cliff
Part of speech: noun
Definition: A vertical (or near vertical) rock face.
Example sentence: There's lots of stuff about me being a fan of Cliff but not being gay. Which suggests that he is, but he's not. Anyway, this is Channel 4, let their lawyers sort it out.
Bluff
Part of speech: noun
Definition: An act of bluffing; an expression of self-confidence for the purpose of intimidation; braggadocio; as, that is only bluff, or a bluff.An attempt to represent yourself as holding a stronger hand than you do.A high, steep bank, as by a river or the sea, or beside a ravine or plain; a cliff with a broad face.A small wood or stand of trees, typically poplar or willow.
Part of speech: verb
Definition: To make a bluff.
Part of speech: adjective
Definition: Having a broad, flattened front; as, the bluff bows of a ship.Rising steeply with a flat or rounded front.Surly; churlish; gruff; rough.Abrupt; roughly frank; unceremonious; blunt; brusque; as, a bluff answer; a bluff manner of talking; a bluff sea captain.