Co-op and Maisonette

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.

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

Maisonette noun - A self-contained apartment (usually on two floors) in a larger house and with its own entrance from the outside.

Co-op and maisonette are semantically related. You can use "Co-op" instead a noun "Maisonette".