The best replacement for multicore is multiprocessor.

The best alternatives to multicore are rated as following:
★★★★★  multiprocessor
★★★  smp
★★  hyperthreading
★★  kester
★  single core
  multithreading

Your alternative for multicore is not listed? Suggest!
Speaking about multicore, one probably shouldn't forget about stage box.

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



Google Trends

Scale is based on the average worldwide traffic of multicore in all years. Click on graph for more.
multicore
multiprocessor
smp