Contentment means 'happiness with one's situation in life'.
http://en.wiktionary.org/wiki/contentment
Happiness, Felicity, Blessedness, Bliss - Happiness is
generic, and is applied to almost every kind of enjoyment
....
http://machaut.uchicago.edu/cgi-bin/WEBSTER.sh ?WORD=happiness
For 'happiness', thesaurus gives the words 'elation and ecstacy'.
Happiness is also used in a negative sense -
power-happy, bomb-happy.
http://www.allwords.com/query.php?SearchType=3 &Keyword=Happiness&goquery=Find+it%21&Language =ENG
... Happiness therefore admits of indefinite "degrees" of
increase in enjoyment, or gratification of desires.
http://adsl-65-66-134-201.dsl.kscymo.swbell.ne t/cgi-bin/webster/webster.exe?search_for_texts _web1828=happiness
Happiness is not one unit which is obtained as a lumpsum - it has degrees.