This is the 2178th most frequent German word.
boeing
"Boeing" is not a German word; it refers to an American aerospace company.
In this context, 'Boeing' is again a proper noun referring to the company, used attributively to describe its facility.
Das Boeing-Werk in Seattle produziert zahlreiche Flugzeuge jährlich.
The Boeing factory in Seattle produces numerous airplanes annually.
In this sentence, 'Boeing' is a proper noun referring to the aircraft manufacturer and is used attributively to specify the model of the airplane.
Die Boeing 747 ist eines der bekanntesten Flugzeugmodelle.
The Boeing 747 is one of the most famous airplane models.
Here, 'Boeing' is used as a proper noun to represent the company Boeing, indicating the engineer's affiliation.