The best replacement for checkout is check out.

The best alternatives to checkout are rated as following:
★★★★★  check out
★★★  paypal
★★  clone
★★  export
★★  lightspeed
★  pull git
★  export svn
★  reset
★  continue shopping
★  update svn
★  pull
★  paypal which is better
  google wallet
  amazon checkout
  paypal fees
  authorize.net
  paypal compare
  paypal business
  pay pal
  checkout
  google checkout
  ipn
  check-out

Your alternative for checkout is not listed? Suggest!
Speaking about checkout, one probably shouldn't forget about account oscommerce.

Other search terms related to checkout and their ratings are:
★★★★★ account oscommerce
★★ .svn
★★ ebay
★ commit
★ tag
yahoo store
cvs
zen cart
clone
You have in mind a companion for checkout and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of checkout in all years. Click on graph for more.
checkout
check out
paypal