This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The ideological movement within modern Islamic fundamentalism which advocates armed jihad. Islamist guerilla warfare or Islamist terrorism.

"The two parallel messages expanded simultaneously, as the foe was identified as jihadism, or in the lingo of the time, “Islamic fundamentalism,” or radical Islam and its derivatives."

jihadist