fastI tried to catch him, but he was too fast for me.
quickI tried to catch him, but he was too quick for me.
promptA prompt reply would be very much appreciated.
speedyEveryone is hoping for a speedy resolution to the conflict.
swiftThe teacher's swift action saved his life.
hastyI don't want to make a hasty decision.
hurriedWe left early after a hurried breakfast.
briskWe took a brisk walk through the park.
expeditiousformalThe train company was fairly expeditious in replying to my complaint.
high-speedPolice were involved in a high-speed car chase.