nota bene vs NB

nota bene and NB both are nouns.

Word	Noun	Adjective	Verb	Adverb
nota bene	Yes	No	No	No
NB	Yes	No	No	No

As nouns, nota bene and NB are synonyms defined as:

nota bene and NB: a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something

Other synonyms of nota bene include N.B..

nota bene (noun)	NB (noun)
a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something	a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something