Can a Cloister be scored if one tile is an all-city tile in Carcassonne?
I believe &quot;tile&quot; and &quot;land tile&quot; are synonymous.  The rules for scoring cloisters states:

A cloister is complete when the tile it is on is completely surrounded by land tiles.

And the rules for drawing tiles is (emphasis mine):

Placing land tiles
First a player must draw a land tile from one of the face-down stacks.

As you can see, tiles are referred to as &quot;land tiles&quot; when drawing.  We can then infer that &quot;tiles&quot; and &quot;land tiles&quot; are the same thing.  So a cloister only has to be surrounded by tiles, not specifically tiles with grass on them.