angle iron vs bracket

angle iron and bracket both are nouns.

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

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

Other hypernyms of angle iron include wall bracket.

angle iron (noun)	bracket (noun)
an L-shaped metal bracket	a support projecting from a wall (as to hold a shelf)
	either of two punctuation marks ([ or ]) used to enclose textual material
	either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material
	a category falling within certain defined limits