Some feelings that have some “happiness”-nature: joy (piti), rapture (piti), bliss (sukha), loving-kindness (metta), adoration, sadness (paradoxically?), bitter-sweet-ness, exaltation, triumph, relief, a variation on wistfulness related to loving-kindness, power, pleasure, communing with God (maybe rapture/adoration/exaltation hybrid?), sehnsucht (sort of?). There are more but the list at least indicates the variety.
Owen Flanagan has done some decent work on eudaimonia, you might find interesting e.g. how eudaimonia (Buddha) differs from eudaimonia (Aristotle) and to some degree what kind of states of mind each value.
Some feelings that have some “happiness”-nature: joy (piti), rapture (piti), bliss (sukha), loving-kindness (metta), adoration, sadness (paradoxically?), bitter-sweet-ness, exaltation, triumph, relief, a variation on wistfulness related to loving-kindness, power, pleasure, communing with God (maybe rapture/adoration/exaltation hybrid?), sehnsucht (sort of?). There are more but the list at least indicates the variety.
Owen Flanagan has done some decent work on eudaimonia, you might find interesting e.g. how eudaimonia (Buddha) differs from eudaimonia (Aristotle) and to some degree what kind of states of mind each value.