Really impresses (4)

I think it could be either:

wows

awes

'really impresses' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for awes that I've seen before include "Fills with admiration" , "Frightens" , "Inspires wonder" .)

I've seen this clue in the USA Today, the King Feature Syndicate, The Wall Street Journal, The New York Times and the Universal.

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