WordNet sense 1 (relative position in a graded series):

gradation

WordNet sense 2 (a short distance):

stone's throw

WordNet sense 3 (the distance covered by a step):

footstep, pace, stride, pace

WordNet sense 4 (the sound of a step of someone walking):

footfall

WordNet sense 5 (a musical interval of two semitones):

tone, whole step, whole tone

WordNet sense 6 (a mark of a foot or shoe on a surface):

footprint, footmark

WordNet sense 7 (support consisting of a place to rest the foot while ascending or descending a stairway):

stair

WordNet sense 8 (treat badly):

abuse, ill-treat, ill-use, maltreat, mistreat, abuse

WordNet sense 9 (put down or press the foot, place the foot):

tread

WordNet sense 10 (a sequence of foot movements that make up a particular dance):

dance step

WordNet sense 11 (any maneuver made as part of progress toward a goal):

measure