The difference between Certainly and Really

When used as adverbs, certainly means in a way which is certain, whereas really means in a way or manner that is real, not unreal.

Really is also interjection with the meaning: indicating surprise at, or requesting confirmation of, some new information.

check bellow for the other definitions of Certainly and Really

  1. Certainly as an adverb:

    In a way which is certain; with certainty.

  2. Certainly as an adverb:

    Without doubt, surely.

    Examples:

    "The accident was certainly caused by human error."

    "That was certainly sweet of him."

    "You may certainly join us for dinner."

  3. Certainly as an adverb:

    An emphatic affirmative answer; of course.

    Examples:

    "Would you like it with ice?  Certainly, and with lemon please."

  1. Really as an adverb (literal):

    In a way or manner that is real, not unreal.

  2. Really as an adverb (modal):

    Actually; in fact; in reality.

    Examples:

    "He really is a true friend."'' / ''"Really? What makes you so sure?"

  3. Really as an adverb (informal, as an intensifier):

    Very (modifying an adjective); very much (modifying a verb).

    Examples:

    "But ma, I really, really want to go to the show!"

  1. Really as a verb:

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