headway
1. [ noun ] vertical space available to allow easy passage under something
Synonyms: clearance headroom
Related terms: room
2. [ noun ] forward movement
Synonyms: head
Examples:

"the ship made little headway against the gale"

Related terms: progress lead
Similar spelling:   heyday
  Hedy
  head
  Heidy
  Heady
  Heyd
  Heid
  heed
  Heydt
  Heidt
  Heidi
  Heide