Happiness
Part of speech: noun
Definition: joy, the emotion of being happy. Good luck; good fortune; prosperity. An agreeable feeling or condition of the soul arising from good fortune or propitious happening of any kind; the possession of those circumstances or that state of being which is attended enjoyment; the state of being happy; contentment; joyful satisfaction; felicity; blessedness. Fortuitous elegance; unstudied grace; — used especially of language.
Example sentence: True happiness is... to enjoy the present, without anxious dependence upon the future.
Felicity
Part of speech: noun
Definition: Happiness.Apt and pleasing style in writing, speech, etc.Something that is either a source of happiness or particularly apt.(Semiotics/semiology) Reproduction of a sign with fidelity. eg. "The quotation was rendered with felicity."
Example sentence: Never lose sight of the fact that all human felicity lies in man's imagination, and that he cannot think to attain it unless he heeds all his caprices. The most fortunate of persons is he who has the most means to satisfy his vagaries.