activity
alacrity
animal spirits
animation
anxiety
anxiousness
appetite
ardor
avidity
avidness
breathless impatience
brio
briskness
capersomeness
cheerful readiness
coltishness
dash
eagerness
enthusiasm
esprit
exuberance
forwardness
friskiness
frolicsomeness
gaiety
gamesomeness
gayness
glow
gust
gusto
heartiness
impatience
impetuosity
impetus
joie de vivre
keen desire
keenness
life
liveliness
lustiness
mettle
oomph
perkiness
pertness
piss and vinegar
playfulness
promptness
quickness
readiness
robustness
Whelan