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Use "unstableness" in a sentence
"It's not always only roses with my husband now, but we both respect each others personality and unstableness."
"The loneliness and abandonment Campana felt during this period ultimately did lead to his unstableness, and when he was called up by the army for duty, he was declared mentally unbalanced, and was classified as hopelessly insane and was put away at the Castel Pulci, a psychiatric hospital, where he remained, carrying on a correspondence with Soffici, Cecchi, and others for the rest of his life."
"HELLMKE: Well, obviously, you don't want to go right out to the edge of the ice where they are because of the unstableness of the ice."