width vs breadth

width and breadth both are nouns.

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

As nouns, width and breadth are synonyms defined as:

width (noun)	breadth (noun)
the extent of something from side to side	the extent of something from side to side
	the capacity to understand a broad range of topics