For physical spaces:
* Append: To add something to the end of something else (e.g., "The architect appended a new wing to the house.")
* Attach: To join something to something else (e.g., "The garage was attached to the main building.")
* Adjoin: To be next to or connected to something else (e.g., "The library adjoined the museum.")
* Extend: To make something longer or larger (e.g., "The company extended its factory to include a new production line.")
For legal or political contexts:
* Incorporate: To include something as a part of something else (e.g., "The city incorporated the neighboring town.")
* Absorb: To take something into something else (e.g., "The larger company absorbed the smaller one.")
* Seize: To take control of something by force (e.g., "The army seized the enemy's territory.")
* Claim: To state that something belongs to you (e.g., "The country claimed the disputed territory as its own.")
In more general terms:
* Add: To include something with something else (e.g., "Please add your name to the list.")
* Include: To make something part of something else (e.g., "The book includes a glossary of terms.")
* Join: To connect things together (e.g., "The two groups joined forces to form a larger organization.")
The best word to use will depend on the specific situation and the intended meaning.