corridor;  gallery;  platform;  passageway
 foothold;  footing;  position;  standing;  ground
 infantry;  infantryman;  foot soldier
 footpath;  walkway;  sidewalk
 horse gait;  way of walking (e.g. in martial arts, etc.)
 quick pace;  quick steps;  quick march;  trot (horse gait)
 walking alone;  walking without assistance;  unique;  matchless;  unparalleled
 snail's pace;  slow progress
 walking speed;  walking pace
 manner of walking;  horse gait
 start-stop synchronization
 walking leg (esp. of an arthropod);  ambulatory leg
 ambulacral zone (on echinoderms);  ambulacrum (on echinoderms)