all-encompassing vs broad

all-encompassing is not a noun while broad is a noun.

Word	Noun	Adjective	Verb	Adverb
all-encompassing	No	Yes	No	No
broad	Yes	Yes	No	No

As adjectives, all-encompassing and broad are synonyms defined as:

Other synonyms of all-encompassing include across-the-board, all-embracing, all-inclusive, blanket, encompassing, extensive, panoptic, wide.

all-encompassing (noun)	broad (noun)
	slang term for a woman

all-encompassing (adjective)	broad (adjective)
broad in scope or content	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