Absinthe is not the same thing as wormwood. Wormwood is a term that has been used for a long, long time to describe any of several dozen plants that fall in the Artemisia genus.
Wormwood is the 2nd most bitter herb on the planet. It has a very penetrating, bitter flavor.
People often ask me, ‘What does wormwood look like?’ I used to carry a bag of it.