warning

[1]	caution , admonition , advice , counsel , caveat , word (to the wise) , tip , notification , notice , threat , lesson , example
[2]	omen , admonition , monition , sign , signal , word of advice , indication , augury , foretoken , portent , foreshadowing , forewarning , prophecy

adj.

[1]	admonitory , cautionary , exemplary , monitory