The best replacement for antibody is antigen.

The best alternatives to antibody are rated as following:
★★★★★  antigen
★★★  antibiotic
★★★  immunoglobulin
★  cell mediated immunity
★  polyclonal antibody
★  t cell
★  aptamer
★  enzyme
★  autoantibody
★  antiserum
★  cellular immunity
★  b cell receptor
  small molecule
  monoclonal antibody
  antibody
  polyclonal
  titer
  monoclonal
  antigen receptor
  surface antibody
  neutralizing antibody
  igg
  cell mediated
  igm
  antibodies
  tpo

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

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



Google Trends

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antibody
antigen
antibiotic