Another word for restroom

"I'm going … to the restroom," she said, heart thudding in her ears.

Could I possibly use the restroom first?

It resembled a studio apartment with a real bed and dresser, a restroom cordoned off by opaque curtains in one corner, a small study where he kept his war docs, a kitchenette, rugs, and a small living area.

Her surveillance team had yet to follow her to the restroom, and she disappeared inside, locking the door.

Sofia, is there a restroom?