No, the word extraordinary is not an adverb. This word is actually an adjective.
The adverb form of the word extraordinary would be extraordinarily.
Super Nanny is filmed both the UK and the US, and has made nanny extraordinaire Jo Frost a household name.
The term extraordinaire is a French word. When translated into the English language, extraordinaire means something that is remarkable or outstanding.
"Extraordinaire"
It is the French for extraordinary.
Christmas Extraordinaire was created on 2001-10-30.
The cast of Chef Extraordinaire - 2014 includes: Pieps Chef Extraordinaire as Himself - Host (2014)
The Hitman Extraordinaire - 2012 was released on: USA: 2012
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The intrepid explorer extraordinaire!