Keywords
Reveal
A revealed tile is a tile with a yellow dot and border. If there are no ships on the revealed tile, it counts as a miss. Otherwise, it shows the 'revealed' tile. However, it does not count as hit. Revealed tiles can be targeted, and there are some ships that can only target revealed tiles, most notably the Coracle.
Hit
A hit tile is a fully yellow tile that must have a ship on it. If all tiles on a ship are hit, the ship is sunk and all hit tiles on that ship become sunk tiles. Sunk tiles are functionally the same as hit tiles.
Unoccupied
The tile does not contain a ship.
Obscure
Take a revealed or missed tile, turn it into an unknown tile.
Combo
When you take multiple turns through an ability.
Cooldown
The amount of turns before an ability can be used.
Sonar
Attack a tile, then show the distance to the nearest ship.
Destroyed
When the final tile of a ship is hit and it sinks.