admonition vs admonishment

admonition and admonishment both are nouns.

Word	Noun	Adjective	Verb	Adverb
admonition	Yes	No	No	No
admonishment	Yes	No	No	No

As nouns, admonition and admonishment are synonyms defined as:

Other synonyms of admonition include monition.

admonition (noun)	admonishment (noun)
a firm rebuke	a firm rebuke
cautionary advice about something imminent (especially imminent danger or other unpleasantness)