word for word vs verbatim

word for word is not an adjective while verbatim is an adjective.

Word	Noun	Adjective	Verb	Adverb
word for word	No	No	No	Yes
verbatim	No	Yes	No	Yes

As adverbs, word for word and verbatim are synonyms defined as:

word for word (adjective)	verbatim (adjective)
	in precisely the same words used by a writer or speaker

word for word (adverb)	verbatim (adverb)
using exactly the same words	using exactly the same words