Synonyms for Spike (same or very similar meaning)
WordNet sense 1 (fruiting spike of a cereal plant especially corn):
ear, capitulumWordNet sense 2 (pierce with a sharp stake or point):
impale, transfix, empaleWordNet sense 3 (bring forth a spike or spikes):
spike outWordNet sense 4 (add alcohol to (beverages)):
fortify, laceFrom the ODE community, based on WordNetadd/edit