For certain and Nothing else but

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

Nothing else but and for certain are semantically related in without doubt topic. In some cases you can use "Nothing else but" instead an adverb phrase "For certain".

For certain and nothing else but are semantically related in without doubt topic. Sometimes you can use "For certain" instead an adverb phrase "Nothing else but".