The best replacement for zulu is nato.

The best alternatives to zulu are rated as following:
★★★★★  nato
★★★★★  british
★★★★  gmt
★★★  utc
★★★  zulu dawn
★★  swahili
★★  fedor
★★  bose
★  boers
★  nato band
★  wallace
★  nato strap
★  zulu 2
★  gracie
★  a20
★  william wallace
★  greenwich mean time
★  rickson
★  xhosa
★  rnww
★  zande
★  butterbean
★  local time
  zing
  utc time
  sierra
  afrikaans
  bose a20
  british army

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

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



Google Trends

Scale is based on the average worldwide traffic of zulu in all years. Click on graph for more.
zulu
nato
british