M3O1N1O1N1U1C3L1E1O1S1E1S1
17 points
MONONUCLEOSES is validvalid
MONONUCLEOSIS,
MONONUCLEOSIS, an abnormal increase of mononuclear white blood cells in the blood
MONONUCLEOSIS,
MONONUCLEOSIS, an abnormal increase of mononuclear white blood cells in the blood