All are nouns except: - "Credit" can also be a verb ("I credit Messi for the team victory") - "Reveal" is a verb, but can colloquially be used as a noun (not exactly correctly - "tune in to next week's episode for the big reveal") but technically we should use the noun form of "reveal," which is "revelation." But you'll see "reveal" used as a noun here and there. Don't say that on a written test, though. You'll get the question wrong. - "Original" is an adjective - "Surprising" can be an adjective. In certain usages, it can be a noun - technically, a gerund. Remember that a gerund is a verb acting like a noun, like "I like running," or "I like learning new languages." So if I said, "I love surprising people on their birthdays," this is a gerund. I am saying I love the act of surprising someone. This would be a noun. But it would be an adjective if you said, "The surprising third episode of Westworld was on Sunday!! What a big reveal/revelation!" (Again, when in doubt, use "revelation."). So you need to know the context in which "surprising" is being used. - Suggest is a verb.

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