Diseasedness refers to the condition of being ill, suffering from a disease or infection. As this term has a negative connotation, its antonyms entail a positive or healthy state of being. The antonyms for diseasedness may include wellbeing, healthiness, fitness, wellness, soundness, vigor, and vitality. These terms signify the absence of illness and good physical and mental condition. Other antonyms may be cleanliness, sterility, hygiene, and sanitation. These words imply a clean and uninfected environment that can prevent the spread of disease. Overall, antonyms for diseasedness describe a healthy and clean environment that is essential for a bounteous and fit life.