valance vs valance board

valance and valance board both are nouns.

Word	Noun	Adjective	Verb	Adverb
valance	Yes	No	No	No
valance board	Yes	No	No	No

As nouns, valance and valance board are synonyms defined as:

valance and valance board: a decorative framework to conceal curtain fixtures at the top of a window casing

Other synonyms of valance include cornice, pelmet.

valance (noun)	valance board (noun)
a decorative framework to conceal curtain fixtures at the top of a window casing	a decorative framework to conceal curtain fixtures at the top of a window casing