Biology

Several plants of the genus Artemisia:
- Artemisia abrotanum, southern wormwood
- Artemisia absinthium, common wormwood, grande wormwood or absinthe wormwood
- Artemisia annua, sweet wormwood or annual wormwood
- Artemisia herba-alba, white wormwood, the wormwood of the Bible
- Artemisia pontica, Roman wormwood
- Artemisia princeps, Korean wormwood
- Artemisia verlotiorum
- Artemisia vulgaris
A caterpillar that eats some of the above:
- Cucullia absinthii, a caterpillar/moth in the family Noctuidae

Places

Wormwood Scrubs, an open space in the Hammersmith area of West London
- HM Prison Wormwood Scrubs, a prison in West London
Wormwood Street, in the City of London
Wormwood Forest, former name of the Red Forest in Ukraine, surrounding the Chernobyl Nuclear Power Plant within the Exclusion Zone

Wormwood, a character in C. S. Lewis's The Screwtape Letters
Matilda Wormwood, the title character of the children's novel Matilda by Roald Dahl
Harry Wormwood, Zinnia Wormwood, Michael Wormwood, other characters in Matilda
Miss Wormwood, a minor character in Calvin and Hobbes
Mrs Wormwood, a character in the first episode of The Sarah Jane Adventures, Invasion of the Bane, who reappeared in Enemy of the Bane

Wormwood (Bible), a "star" that falls to earth in the end times, makes water bitter, and kills many people
Wormwood (short story collection), a book of short horror stories by Poppy Z. Brite
Wormwood (Taylor novel), a 2004 fantasy novel by Graham Taylor
Wormwood, a collection of science fiction stories by Terry Dowling
Wormwood: A Drama of Paris, an 1890 novel by Marie Corelli

Wormwood (magazine), a magazine of literature and literary criticism
Wormwood: Gentleman Corpse, a comic book series by Ben Templesmith
Wormwood Review, a literary magazine published from 1959 to 1999
Chronicles of Wormwood, a comic book miniseries by Garth Ennis from Avatar Press