The best replacement for payload is towing.

The best alternatives to payload are rated as following:
★★★★★  towing
★★★★★  useful load
★★★★  towing capacity
★★★★  gvwr
★★★  exploit
★★  gross vehicle weight
★★  gross weight
★  range aircraft
  gvw
  tongue weight
  line loopback
  form data

Your alternative for payload is not listed? Suggest!
Speaking about payload, one probably shouldn't forget about metasploit.

Other search terms related to payload and their ratings are:
★★★★★ metasploit
★★ tcpdump
You have in mind a companion for payload and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of payload in all years. Click on graph for more.
payload
towing
useful load