Nails

I can't cut my nails and do the ironing at the same time!

Don't bite your nails.

You must get rid of the habit of biting your nails.

I was biting my nails, worrying about you.

You're usually as tough as nails.

I never cut my nails at night.

He hammered nails into the plank.

He managed to cure himself of his habit of nibbling his nails.

He has a habit of scratching his back and biting his nails.

She has a habit of biting her nails.