Rareness
Part of speech: noun
Definition: The property of being rare; rarity
Rarity
Part of speech: noun
Definition: A rare object.A measure of the scarcity of an object.
Example sentence: 'MaerskKendal' is a rarity with its British flag, the 'LONDON' home port painted on its bow, its two British chief officers, and its portrait of the queen in the mess room, apparently common courtesy on British ships, but a little alarming to me.