This is the list of words that are used that may have a different meaning than you're used to or haven't heard before:

SC - Stands for Stone Circles

Flood (-ing) - Tunnels spawn units that go through them in a "flood plain". To flood into something is to use that flood plain to go around walls or to fill a space. The limit is currently 17 hexes from the tunnel in any direction and 35 across (17 tunnel 17) 

AA - Stands for auto-attack. A setting where units will automatically attack units in their range.

FS - Stands for Flagship