For certain and Very much

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

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

Very much adverb - To a very great degree or extent.

For certain and very much are semantically related. Sometimes you can use "For certain" instead an adverb phrase "Very much".