for sure vs sure enough

for sure is an adjective but sure enough is not an adjective.

Word	Noun	Adjective	Verb	Adverb
for sure	No	Yes	No	Yes
sure enough	No	No	No	Yes

As adverbs, for sure and sure enough are synonyms defined as:

for sure and sure enough: definitely or positively (`sure' is sometimes used informally for `surely')

Other synonyms of for sure include certainly, for certain, sure, sure as shooting, surely.

for sure (adjective)	sure enough (adjective)
not open to doubt

for sure (adverb)	sure enough (adverb)
definitely or positively (`sure' is sometimes used informally for `surely')	as supposed or expected
	definitely or positively (`sure' is sometimes used informally for `surely')