ETYM Old Eng. blis, blisse, AS. blis, blîths, from blîthe blithe. Related to Blithe.
A state of extreme happiness; SYN. blissfulness, cloud nine, seventh heaven, walking on air.

ETYM Old Eng. felicite, French félicité, from Latin felicitas, from felix, -icis, happy, fruitful; akin to fetus.
Pleasing and appropriate manner or style, esp. of expression; SYN. felicitousness.
Happiness; well chosen word or phrase.

ETYM From Happy.
1. Emotions experienced when in a state of well-being.
2. State of well-being characterized by emotions ranging from contentment to intense joy; SYN. felicity.

ETYM Old Eng. joye, Old Fren. joye, joie, goie, French joie, Latin gaudia, pl. of gaudium joy, from gaudere to rejoice, to be glad. Related to Gaud, Jewel.
1. Something or someone that provides pleasure; a source of happiness; SYN. delight, pleasure.
2. The emotion of great happiness; SYN. joyousness, joyfulness.