American Heritage Dictionary
(1)
Century Dictionary
(4)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
I might liken it to Battletoads (except this time you can decapitate organic creatures and not just blow up robots).— Xboxic
Impale, decapitate, and stab enemies on Nintendo's family-friendly platform this week.— GameSpot's News, Screenshots, Movies, Reviews, Previews, Downloads, and Features
In the days leading up to September the First, the enemy attempted to decapitate what it viewed as an "organization".— Anarchist news dot org - News for anarchists and their friends

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.
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