alphanumeric display vs digital display

alphanumeric display and digital display both are nouns.

Word	Noun	Adjective	Verb	Adverb
alphanumeric display	Yes	No	No	No
digital display	Yes	No	No	No

As nouns, alphanumeric display and digital display are synonyms defined as:

alphanumeric display and digital display: a display that gives the information in the form of characters (numbers or letters)

alphanumeric display (noun)	digital display (noun)
a display that gives the information in the form of characters (numbers or letters)	a display that gives the information in the form of characters (numbers or letters)