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

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v. Simple past tense and past participle of alert.

"Dorothy Martin alerted them first to the space-landers coming to retrieve them from the flood."

vigilant    fly    wide-awake    Argus-eyed    heads-up    sleepless    lidless    wakeful    open-eyed    cognisant   

alerted    alerting    alertness    alerts   

nimble   

lively    quick    active    prompt    agile    watchful    vigilant    brisk    nimble   

Bert    Curt    Evert    Insert    Kurt    assert    avert    birt    blurt    burt   

intelligent    eager    watchful    keen    attentive    confident    able    shrewd