error vs literal error

error and literal error both are nouns.

Word	Noun	Adjective	Verb	Adverb
error	Yes	No	No	No
literal error	Yes	No	No	No

As nouns, literal error is a hyponym of error; that is, literal error is a word with a more specific, narrower meaning than error:

error: part of a statement that is not correct
literal error: a mistake in printed matter resulting from mechanical failures of some kind

Other hyponyms of error include corrigendum, erratum, literal, misprint, typo, typographical error.

error (noun)	literal error (noun)
a wrong action attributable to bad judgment or ignorance or inattention	a mistake in printed matter resulting from mechanical failures of some kind
(baseball) a failure of a defensive player to make an out when normal play would have sufficed
inadvertent incorrectness
departure from what is ethically acceptable
a misconception resulting from incorrect information
part of a statement that is not correct
(computer science) the occurrence of an incorrect result produced by a computer