The word(s) "horror" appears 4 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) Consider not that Allah is unaware of that which the Zalimun (polytheists, wrong-doers) do, but He gives them respite up to a Day when the eyes will stare in horror.

(2) And the true promise (Day of Resurrection) shall draw near (of fulfillment). Then (when mankind is resurrected from their graves), you shall see the eyes of the disbelievers fixedly staring in horror. (They will say): "Woe to us! We were indeed heedless of this - nay, but we were Zalimun (polytheists and wrong-doers)."

(3) Men whom neither trade nor sale (business) diverts from the Remembrance of Allah (with heart and tongue), nor from performing As-Salat (Iqamat-as-Salat), nor from giving the Zakat. They fear a Day when hearts and eyes will be overturned (out of the horror of the torment of the Day of Resurrection).

(4) So leave them alone till they meet their Day, in which they will sink into a fainting (with horror).