appeal board vs appeals board

appeal board and appeals board both are nouns.

Word	Noun	Adjective	Verb	Adverb
appeal board	Yes	No	No	No
appeals board	Yes	No	No	No

As nouns, appeal board and appeals board are synonyms defined as:

appeal board and appeals board: a board of officials that are not judicial but are appointed to hear appeals

Other synonyms of appeal board include board of appeals.

appeal board (noun)	appeals board (noun)
a board of officials that are not judicial but are appointed to hear appeals	a board of officials that are not judicial but are appointed to hear appeals