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1.
fantaseal

fan-tuh-seel
noun
an extreme belief in an imagined reality marked with obsessive compulsive behavior
"Her fantaseal , that the son of another woman, was her son, led to her kidnapping him, making claims that she is the mother, and engaging in repeated tactics to assert the fantaseal, as well as to keep the child and actual mother apart."
by JawaBoo November 19, 2011