The phrase shower stall is a noun. Shower Stall means (1) booth for washing yourself, usually in a bathroom.
The following articles and web pages elaborate on the phrase shower stall.
A shower area may be included as part of a traditional shower/tub space, or may be freestanding by itself. A freestanding shower stall comes in many shapes, and may or may not have a curtain or glass door.
https://www.shower-stalls.com/
Bathroom Showers
A shower is a quick and efficient alternative to a bath. Learn about different types of showers and discover the type that is right for you and your bathroom.
Visit this ceramic tile supplier directory for information about ceramic tile suppliers in the United States of America. The photo on this page depicts ceramic tiles in a bathroom shower stall.
Many bathroom renovations would not be complete without a shower upgrade. This information about shower stalls, shower fittings, and shower doors makes it easy to design a shower stall for your bathroom.
https://www.shower-stalls.com/doors.htm
The following digital image illustrates the phrase shower stall.