Meaning : Cautionary advice about something imminent (especially imminent danger or other unpleasantness).
Example :
A letter of admonition about the dangers of immorality.
The warning was to beware of surprises.
His final word of advice was not to play with matches.
Synonyms : monition, warning, word of advice
Meaning : A firm rebuke.
Synonyms : admonishment, monition