1. (n.) The progress made by a ship in motion; hence, progress or success of any kind.

2. (n.) Clear space under an arch, girder, and the like, sufficient to allow of easy passing underneath.

Great Leap Forward advance advancement advancing amelioration amendment anabasis ascent bettering betterment boost career course driftway enhancement enrichment eugenics euthenics forward motion forwardal forwarding furtherance furthering gain ground get ahead get going go go ahead go-ahead improvement leeway lift make headway march melioration mend mending move forward ongoing onward course passage pickup preferment proceed proficiency progress progression progressiveness promotion recovery restoration revival rise rolling rolling on steerageway sternway travel upbeat uplift upping upswing uptrend upward mobility way