Vac is a 3 letter English word. It's valid Words with friends word worth 10 points.
You can make 17 anagrams from letters in VAC (acv).
by shortening
It was a ferociously hot day at the beginning of the summer vac.
She might or might not have her vac suit on; I knew she had several of them on Ceres.
I glanced at the holster under my armpit, walked back over to the locker, opened it, and took out my vac suit.
But on the moon nobody responds to an emergency call without a vac suit.
Nobody would put on a vac suit and run away like that if he was in his right mind.
I carried it back with me when I returned to Garside after vac.
He checked it over carefully and began shucking his vac suit.
It obviously hadn't been a nuclear blow-up of any proportions, or he wouldn't be here now, zipping up the front of his vac suit.
That evening he heard the Winchester boys making plans for the winter sports at Pontresina in the Christmas vac.
There was plenty of air still in this corridor, and there was apparently little likelihood of his needing his vac suit.