The only entries that are actually used in game are:
DEFAULT
RUN
ATTACK1 through ATTACK3
DEATH
FORTIFY
FIDGET
VICTORY
BUILD
ROAD
MINE
IRRIGATE
FORTRESS
CAPTURE
JUNGLE
FOREST
PLANT
Most are pretty self-explanatory, however there are a few tricky ones.....
IRRIGATE is used by worker units when irrigating or cleaning up pollution
BUILD is used by settler units when founding cities OR air transports and/or paratrooper units to assign their paradrop animation
FORTRESS is used by WOrker units when building a fortress, colony radar tower, airfield, and outpost.
JUNGLE is used when clearing swamps or jungles
Hope that helps a bit.