What word means bringing together of dwellings in greek?

There isn't one single perfect Greek word to describe the "bringing together of dwellings" in the sense of a planned community or settlement. The concept needs to be expressed more circumstantially. However, words and phrases that come close, depending on the nuance, include:

* Οἰκισμός (oikismos): This refers to the founding or settlement of a place, often implying the bringing together of people to form a community. While not directly "dwellings," it strongly implies their existence.

* Συνοικισμός (synoikismos): This specifically refers to the merging of several smaller settlements into one larger one. This gets closest to the idea of a deliberate "bringing together."

* Κατοίκηση (katoikisi): This means "inhabitation" or "settlement." It doesn't explicitly describe the *act* of bringing dwellings together but the result.

The best word choice would depend heavily on the context. If you can provide more details about the specific situation you are describing, I may be able to suggest a more precise translation.