For certain and Righteously

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

Righteously and for certain are semantically related. In some cases you can use "Righteously" instead an adverb phrase "For certain".

Righteously adverb - With purity of thought and deed.

For certain and righteously are semantically related. Sometimes you can use "For certain" instead an adverb "Righteously".