What is another name for a hairnet?

There isn't really a widely used, common synonym for "hairnet". However, depending on the context, you could use these alternatives:

For general use:

* Hair covering: This is a more general term and could refer to other types of head coverings as well.

* Hair tie: This is less precise, but it could be used if you're talking about a hairnet in a casual setting.

For specific industries:

* Food service hairnet: This is a more specific term for hairnets used in food preparation.

* Industrial hairnet: This is a more specific term for hairnets used in manufacturing or other industrial settings.

Ultimately, the best way to find a substitute for "hairnet" is to consider the context in which you're using the word.