What is the synonym of word cautioned?

Here are some synonyms for "cautioned," depending on the specific context:

General warnings:

* Advised

* Warned

* Alerted

* Notified

* Informed

* Reminded

* Suggested

Emphasis on seriousness:

* Forewarned

* Apprised

* Put on notice

Emphasis on urgency:

* Urged

* Implored

* Begged

* Plead with

Emphasis on specific consequences:

* Discouraged

* Detoured

* Prevented

Informal:

* Told off

* Given a heads-up

* Put on the spot

The best synonym will depend on the specific situation and the tone you want to convey.