The difference between Certainly and Doubtlessly

When used as adverbs, certainly means in a way which is certain, whereas doubtlessly means without question.

check bellow for the other definitions of Certainly and Doubtlessly

  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. Doubtlessly as an adverb (sometimes, proscribed):

    Without question; indubitably.

    Examples:

    "There are doubtlessly more insects than mammals."

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