aback
1. [ adverb ] (nautical) having the wind against the forward side of the sails
Examples:

"the ship came up into the wind with all yards aback"

2. [ adverb ] by surprise
Examples:

"taken aback by the caustic remarks"

Similar spelling:   ABC
  ABCs
  abuja
  ABC's
  Abbas
  abaca
  abbacy
  abasia