Stalker

Verb (used without object)

to pursue or approach prey, quarry, etc., stealthily.

to walk with measured, stiff, or haughty strides

He was so angry he stalked away without saying goodbye.

to proceed in a steady, deliberate, or sinister manner

Famine stalked through the nation.

Obsolete . to walk or go stealthily along.

Verb (used with object)

to pursue (game, a person, etc.) stealthily.

to proceed through (an area) in search of prey or quarry

to stalk the woods for game.

to proceed or spread through in a steady or sinister manner

Disease stalked the land.

Noun

an act or course of stalking quarry, prey, or the like

We shot the mountain goat after a five-hour stalk.

a slow, stiff stride or gait.