display board vs display panel

display board and display panel both are nouns.

Word	Noun	Adjective	Verb	Adverb
display board	Yes	No	No	No
display panel	Yes	No	No	No

As nouns, display board and display panel are synonyms defined as:

display board and display panel: a vertical surface on which information can be displayed to public view

Other synonyms of display board include board.

display board (noun)	display panel (noun)
a vertical surface on which information can be displayed to public view	a vertical surface on which information can be displayed to public view