crosspiece vs crossbeam

crosspiece and crossbeam both are nouns.

Word	Noun	Adjective	Verb	Adverb
crosspiece	Yes	No	No	No
crossbeam	Yes	No	No	No

As nouns, crosspiece and crossbeam are synonyms defined as:

crosspiece and crossbeam: a horizontal beam that extends across something

Other synonyms of crosspiece include trave, traverse.

crosspiece (noun)	crossbeam (noun)
a transverse brace	a horizontal beam that extends across something
a horizontal beam that extends across something