Antonyms of adj motionless

1 sense of motionless

Sense 1
inactive, motionless, static, still -- (not in physical motion; "the inertia of an object at rest")

INDIRECT (VIA nonmoving) -> moving -- (in motion; "a constantly moving crowd"; "the moving parts of the machine")

Similarity of adj motionless

1 sense of motionless

Sense 1
inactive, motionless, static, still -- (not in physical motion; "the inertia of an object at rest")
       => nonmoving (vs. moving), unmoving -- (not in motion)