White as a sheet, perhaps

Usage examples of horrorstricken.

All people, in a word, would come stumbling over their thresholds, and turning up their amazed and horrorstricken visages around the scaffold.

Voiceless, horrorstricken, she turned and ran blindly into the smoke, all sense of direction lost.

New cries rose, and he went on, horrorstricken at what he knew was happening.

Nikki's horrorstricken voice arrived un expectedly from the stair landing.