A Word for Halloween: Scarify
Use this word. We dare you.
Oh, sorry—did I scarify you?
Yes, I did say "scarify." Scarify rhymes with terrify, and has a meaning that sits somewhere between that word and the scare that birthed its first syllable.
It's not a common word, but it's more than 200 years old, and it's every bit as good a verb as its synonyms, frighten, spook, and the like. Usually, though, it appears in its present participle form, scarifying, as an adjective:
After father and son leave the bunker and loved one—on ice—the novel trumps its scarifying first half with a few pages so surprising a reviewer shouldn't give the game away.
— John Domini, The Philadelphia Inquirer, 6 May 2016
"Each 'Treehouse' episode, as long-time fans will know, abandons the animated series’ usual airtight continuity and rock-solid commitment to reality in order to tell tales of the bizarre, the paranormal, and the truly scarifying."
— Joe Blevins, AV Club, 23 Oct. 2015
"The Scarifying Babadook Is a Rare Horror Triumph" — headline, The Village Voice, 26 Nov. 2014
Note that this scarify isn't the only scarify in town: there's an older one (as in 15th century old), and its basic meaning is "to make scratches or cuts in." You can see its full definition here. (Don't be scared to click on that link.)