- forgetfulness - tendency to forget
--1 is a kind of amnesia, memory loss, blackout
--1 has particulars: senior moment- forgetfulness - unawareness caused by neglectful or heedless failure to remember; "his forgetfulness increased as he grew older"
--2 is a kind of unknowingness, unawareness
--2 has particulars: obliviousness, oblivion - forgetfulness - unawareness caused by neglectful or heedless failure to remember; "his forgetfulness increased as he grew older"