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

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v. Present participle of rile.

"Still, Gruden seemed to like every draft pick, suggesting that maybe there's no point in riling up players he might end up coaching — or coaching against."

powerful   

subordinate   

ruling elder    ruling case   

directing    controlling    guiding    governing    prevalent    predominant    prevailing    chief    reigning    regnant   

rule   

cooling    drooling    dueling    fooling    fueling    fuelling    grueling    pooling    refueling    retooling