Block and Close off

Block verb - To close up so that no empty spaces remain.

Close off and block are semantically related in obstruct topic. In some cases you can use "Close off" instead a verb "Block".

Nearby Words: blocked, blockade, blockage, blockhead, blocking

Close off verb - To disallow entry into (a place) by means of a physical barrier at the entry point.

Block and close off are semantically related in obstruct topic. You can use "Block" instead a verb "Close off", if it concerns topics such as prevent.