extreme vs extremely

extreme is a noun but extremely is not a noun.

Word	Noun	Adjective	Verb	Adverb
extreme	Yes	Yes	No	No
extremely	No	No	No	Yes

extreme (noun)	extremely (noun)
the furthest or highest degree of something
the point located farthest from the middle of something

extreme (adjective)	extremely (adjective)
most distant in any direction
far beyond a norm in quantity or amount or degree; to an utmost degree
of the greatest possible degree or extent or intensity
beyond a norm in views or actions

extreme (adverb)	extremely (adverb)
	to an extreme degree
	to a high degree or extent; favorably or with much respect