surely vs sure as shooting

surely is not an adjective while sure as shooting is an adjective.

Word	Noun	Adjective	Verb	Adverb
surely	No	No	No	Yes
sure as shooting	No	Yes	No	Yes

As adverbs, surely and sure as shooting are synonyms defined as:

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

Other synonyms of surely include certainly, for certain, for sure, sure, sure enough.

surely (adjective)	sure as shooting (adjective)
	absolutely certain

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