For certain and For real

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

For real and for certain are semantically related in definitely topic. In some cases you can use "For real" instead an adverb phrase "For certain", when it comes to topics like without doubt.

For certain and for real are semantically related in definitely topic. Sometimes you can use "For certain" instead an adverb phrase "For real", if it concerns topics such as without doubt.