Difference between Hoarfrost and Frost

Hoarfrost

Part of speech: noun

Definition: Dew-drops which have undergone deposition and frozen into ice crystals to form a white deposit on an exposed surface, when the air is cold and moist.

Frost

Part of speech: verb

Definition: To get covered with frost.To coat something (eg a cake) with white icing to resemble frost.To anger or annoy.

Part of speech: noun

Definition: A cover of minute ice crystals on objects that are exposed to the air. Some of these are tree branches, plant stems, leaves, wires, poles, vehicles, rooftops, or aircraft skin. Frost is the same process by which dew is formed except that the temperature of the frosted object is below freezing. Frost can be light or heavy.The cold weather that would cause frost as in (1) to form.

Example sentence: I guess the best advice I ever got or anyone could get for doing a talk show, though it has not been easy very often, was from Jack Paar, who said, 'Kid, don't make it an interview. Interviews have clipboards, and you're like David Frost. Make it a conversation.'