wall bracket vs corbel

wall bracket and corbel both are nouns.

Word	Noun	Adjective	Verb	Adverb
wall bracket	Yes	No	No	No
corbel	Yes	No	Yes	No

As nouns, corbel is a hyponym of wall bracket; that is, corbel is a word with a more specific, narrower meaning than wall bracket:

wall bracket: a support projecting from a wall (as to hold a shelf)
corbel: (architecture) a triangular bracket of brick or stone (usually of slight extent)

Other hyponyms of wall bracket include angle bracket, angle iron, console, truss, modillion, sconce, shelf bracket.

wall bracket (noun)	corbel (noun)
a support projecting from a wall (as to hold a shelf)	(architecture) a triangular bracket of brick or stone (usually of slight extent)

wall bracket (verb)	corbel (verb)
	furnish with a corbel