1, different parts of speech: wellbeing used as a noun, and well being can be used as an adjective or noun.
2. Different meanings: Well-being means "health, happiness and entertainment" and well-being means "a good state of being".
3. Different usages: wellbeing describes people's health, happiness and happiness, while Well Being can be used to describe the good state and situation of things and can be used to describe people's physical and mental health.
4. Different collocation: the collocation of welfare with personal welfare and social welfare. Well being is used with a sense of happiness and economic happiness.