Pink pepper can refer to three different species, from the Euonymus and Schinus families. One is from Madagascar and the other one is from South America.
As another example, Sichuan pepper can come from 6 different species of the Zanthoxylum family.
Well that's sort of a good example. The word "coriander" is used all over the world, but in some places refers to the leaf (in other word, what some places call "cilantro") and in other places refers to the ground seed.