We have a bit of wall sticking out of a flat wall
I have always called it the sticky outy bit of the wall and everyone knew what I meant. My boss told me I need to find out the proper name for a bit of wall that sticks out because it is a point of reference in a document. I can't keep on calling it the sticky-outy bit that I've called it for the last 3 years.
I've been looking at https://www.house-design-coffee.com/architectural-dictionary.html. There is the word architrave but it is for a horizontal section below the roof.
There is also pilaster but all the examples I've seen have fancy decorations on it. A sort of fake column. Can it be called a pilaster if there are no decorations?
The other alternative is protrusion - can this be used for something that sticks out from ceiling to floor or just a bit of wall.
To answer @Fred's query - it is about 1ft (30cm wide) and about 4" (10cm) deep. It stretches from ceiling to floor. I've got no idea what it is for. Sorry, I cannot supply a photograph - it is in one of those restricted areas where cameras aren't allowed.