French word horreur comes from Latin horreo, and later Old French horror (Horror or terror.)

Detailed word origin of horreur

Dictionary entry	Language	Definition
horreo	Latin (lat)	I am frightful.. I dread, am afraid of.. I stand erect, stand on end.. I tremble, shiver.
horror	Latin (lat)	Bristling (standing on end). Dread, terror, horror. Shaking, shivering, chill.
horror	Old French (fro)	Horror or terror.
horreur	French (fra)	(film) horror. Eyesore. Horror (emotion). Horror (something horrible).

Words with the same origin as horreur