broad vs breadth

broad and breadth both are nouns.

Word	Noun	Adjective	Verb	Adverb
broad	Yes	Yes	No	No
breadth	Yes	No	No	No

broad (noun)	breadth (noun)
slang term for a woman	the extent of something from side to side
	the capacity to understand a broad range of topics

broad (adjective)	breadth (adjective)
having great (or a certain) extent from one side to the other
showing or characterized by broad-mindedness
lacking subtlety; obvious
broad in scope or content
not detailed or specific
being at a peak or culminating point
very large in expanse or scope
(of speech) heavily and noticeably regional