angle iron vs wall bracket

angle iron and wall bracket both are nouns.

Word	Noun	Adjective	Verb	Adverb
angle iron	Yes	No	No	No
wall bracket	Yes	No	No	No

As nouns, wall bracket is a hypernym of angle iron; that is, wall bracket is a word with a broader meaning than angle iron:

Other hypernyms of angle iron include bracket.

angle iron (noun)	wall bracket (noun)
an L-shaped metal bracket	a support projecting from a wall (as to hold a shelf)