This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A small sunken area allowing access or light and air to basement doors or windows.

n. An often narrow passageway between buildings.

n. An outdoor passage offering access to a basement.

n. a passageway between buildings or giving access to a basement

""I have three rooms here, and the back one opens into a kind of areaway from which I get into an abandoned storeroom, or I guess it's an attic."

passageway   

record-room    highrise    boiler-room    bar'l    itvery    grout    glamor    content    playroom    subfloor