The best replacement for tanker is tender.

The best alternatives to tanker are rated as following:
★★★★★  tender
★★★  flatbed
★★★  dry van
★★  brute
★★  aircraft carrier
★★  bulker
★  reefer
★  pumper
★  airbus tanker
★  boeing tanker
★  cruise ship
  eads
  tanker
  liner
  pipeline
  cav scout
  airbus

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

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



Google Trends

Scale is based on the average worldwide traffic of tanker in all years. Click on graph for more.
tanker
tender
flatbed