stair, whole step, footmark, move, sounds, whole tone, pace, tone, gait, footprint, stone's throw, footstep, tread, measure, step, gait, gradation, dance step, stride.
She was startled by the sound of a footfall.
I heard a footfall
on the walk, a cautious knocking on the great front door.
There is certainly a stir somewhere, but he can not locate it, not quite satisfy himself whether it is a footfall
or a rustle that he hears.