wellbeing vs well-being

wellbeing and well-being both are nouns.

Word	Noun	Adjective	Verb	Adverb
wellbeing	Yes	No	No	No
well-being	Yes	No	No	No

As nouns, wellbeing and well-being are synonyms defined as:

wellbeing and well-being: a contented state of being happy and healthy and prosperous

Other synonyms of wellbeing include eudaemonia, eudaimonia, upbeat, welfare.

wellbeing (noun)	well-being (noun)
a contented state of being happy and healthy and prosperous	a contented state of being happy and healthy and prosperous