The best replacement for adjuvant is neoadjuvant.

The best alternatives to adjuvant are rated as following:
★★★★★  neoadjuvant
★★★★  surfactant
★★★  palliative
★★★  neoadjuvant treatment
★★  neoadjuvant therapy
★★  neoadjuvant chemotherapy
★  adjunct
★  metastatic
★  non adjuvant
  adjunctive
  hapten
  adjuvant
  neo adjuvant

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

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



Google Trends

Scale is based on the average worldwide traffic of adjuvant in all years. Click on graph for more.
adjuvant
neoadjuvant
surfactant