What word goes before block?

There are many words that can go before "block"! It depends on the context. Here are a few examples:

For buildings and structures:

* City block

* Apartment block

* Building block

* Traffic block

For objects:

* Puzzle block

* Lego block

* Wood block

* Concrete block

For actions:

* Block party

* Block off

* Block out

* Blockbuster

For computer science:

* Code block

* Memory block

* Firewall block

To give you a more specific answer, could you tell me what you're trying to describe?