General noun:
* Circle: This is the most general and common noun, referring to a closed curve with all points equidistant from the center.
More specific nouns:
* Enclosure: This refers to the act of surrounding something, often with a fence or other barrier.
* Ring: This is a specific type of circle, often made of metal or other material.
* Circumference: This refers to the boundary line of a circle.
* Girdle: This refers to a belt or sash that encircles the waist.
* Embrace: This refers to the act of holding something closely or affectionately.
* Surroundings: This refers to the things that are around a particular place or object.
The best noun to use will depend on the specific meaning of "encircle" in the context.