Scientific:
* Shell: This is the most common and accurate scientific term.
* Conch: This refers to the shell of a marine snail.
Informal:
* Snail's home: This is a simple and straightforward description.
* Shell: This is commonly used in an informal context.
* Home: This is a general term that can be used to refer to any animal's living space.
Figurative:
* House: This is a metaphorical way of referring to the snail's shell.
The best way to choose the right word depends on the specific situation and the level of formality you need.