hand over fist (adv.)

• amain
• apace
• cursorily
• expeditiously
• fast
• feverishly
• furiously
• hastily
• helter-skelter
• hotfoot
• hurriedly
• immediately
• instantly
• pell-mell
• post
• promptly
• quick
• quickly
• rapidly
• slapdash
• speedily
• superficially
• swiftly
• trippingly