Co-op and Office block

Co-op noun - A jointly owned commercial enterprise (usually organized by farmers or consumers) that produces and distributes goods and services and is run for the benefit of its owners.

Office block and co-op are semantically related. In some cases you can use "Office block" instead a noun phrase "Co-op".

Office block noun - A building containing offices where work is done.

Co-op and office block are semantically related. You can use "Co-op" instead a noun phrase "Office block".