extensive vs all-encompassing

extensive and all-encompassing both are adjectives.

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

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

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

extensive (adjective)	all-encompassing (adjective)
of agriculture; increasing productivity by using large areas with minimal outlay and labor	broad in scope or content
broad in scope or content
large in spatial extent or range or scope or quantity