This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Third-person singular simple present indicative form of instigate.

"The death of a brother lingers profoundly in the life of his emotionally damaged sibling just as the Big Bang reverberates throughout the cosmos, and a relatively small meteorite crash instigates a cataclysmic ripple of death for the dinosaurs."

instigated    instigates    instigating   

cause    get    have    induce    stimulate   

instigator    instigation   

incite    tempt    animate    encourage    urge