admonishment vs admonition

admonishment and admonition both are nouns.

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

As nouns, admonishment and admonition are synonyms defined as:

Other synonyms of admonishment include monition.

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