headway

Noun
  1. Vertical space available to allow easy passage under something (synset 113800473)
    is a type of: elbow room, room, way - space for movement
    same as: clearance, headroom
  2. Forward movement (synset 107387379)
    "the ship made little headway against the gale"
    is a type of: advance, progress, progression - a movement forward
    same as: head

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