The difference between Certainly and Sure thing

Certainly is also adverb with the meaning: in a way which is certain.

Sure thing is also noun with the meaning: that which is certain.

check bellow for the other definitions of Certainly and Sure thing

  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. Sure thing as a noun (US):

    That which is certain.

    Examples:

    "synonyms certainty"

    "That horse is a sure thing in the race at 3:30."

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