For sure and For a fact

For sure adverb - Definitely or positively (`sure' is sometimes used informally for `surely').

For a fact and for sure are semantically related in definitely topic. In some cases you can use "For a fact" instead the phrase "For sure" as an adjective or an adverb. popular alternative

For sure and for a fact are semantically related in exactly topic. You can use "For sure" instead the phrase "For a fact" as an adjective or an adverb, if it concerns topics such as accurately, made certain. popular alternative