1) Animal spirits 2) Attribute 3) Bon naturel 4) Brightness 5) Cheer 6) Flow of spirits 7) Gaiete de coeur 8) Gaiety 9) Gayety 10) Geniality 11) Glee 12) Good humor 13) Happiness 14) High glee 15) High spirits 16) Jollity 17) Joviality 18) Joyfulness 19) Lallegro 20) Laughter 21) Light heart 22) Liveliness 1) Blitheness 2) Breeziness 3) Buoyance 4) Buoyancy 5) Carefreeness 6) Content 7) Contentment 8) Enthusiasm 9) Fun 10) Gaiety 11) Happiness 12) Hilarity 13) Hopefulness 14) Insouciance 15) Jolliness 16) Lightheartedness 17) Lightsomeness 18) Liveliness 19) Merriment 20) Perkiness 21) Resilience 
• (n.) Good spirits; a state of moderate joy or gayety; alacrity.
Cheer'ful·ness noun Good spirits; a state of moderate joy or gayety; alacrity. 
[n] - a feeling of spontaneous good spirits 2. [n] - the quality of being cheerful and dispelling gloom
cheer noun the quality of being cheerful and dispelling gloom; `flowers added a note of cheerfulness to the drab room`