Her features smoothed somewhat as she backed the anger up.

Elaida fought to keep her features smooth, and barely succeeded.

Frane's stiff features smoothed into a grateful smile.

His features quickly smoothed themselves back into inscrutability.

His features smoothed a little as he continued to watch me.

Whatever Thom and Galad thought, they had enough sense to keep their features smooth.

I watched his features smooth and grow blank.

Danjit's Mars-tanned features smoothed in a sensual grimace of pleasure.

And then, just as suddenly, her features smoothed, impassive.

Immediately his features smoothed over and he simply said, "I see.