The best replacement for donor is donee.

The best alternatives to donor are rated as following:
★★★★★  donee
★★★  adoption
★★★  donator
★★  sponsor
★★  acceptor
★  donor
★  contributor
★  grantor
★  cadaver
★  host
★  cadaver donor
  organ registry
  gyro
  an acceptor
  proton acceptor
  anonymous
  non organ donor
  no donor
  pi acceptor
  embryo donor
  universal recipient

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

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



Google Trends

Scale is based on the average worldwide traffic of donor in all years. Click on graph for more.
donor
donee
adoption