The patient complained of 'sickness' [='nausea'] and stomach pains.
She missed work due to 'sickness'. [='illness']
He died from an unknown 'sickness'.
(..) Statue! Do you, George, Sheriff of Nottingham... ...take this woman for your wife? To have and hold... ...in sickness and in health, for better or worse-- Yes, yes! Come on! Make haste! And do you, Marian, take this man to be your husband? (..)1991 Robin Hood: Prince of Thieves