typo vs erratum

typo and erratum both are nouns.

Word	Noun	Adjective	Verb	Adverb
typo	Yes	No	No	No
erratum	Yes	No	No	No

As nouns, typo and erratum are synonyms defined as:

typo and erratum: a mistake in printed matter resulting from mechanical failures of some kind

Other synonyms of typo include literal, literal error, misprint, typographical error.

typo (noun)	erratum (noun)
a mistake in printed matter resulting from mechanical failures of some kind	a mistake in printed matter resulting from mechanical failures of some kind