extrapolate vs extrapolation

extrapolate is not a noun while extrapolation is a noun.

Word	Noun	Adjective	Verb	Adverb
extrapolate	No	No	Yes	No
extrapolation	Yes	No	No	No

extrapolate (noun)	extrapolation (noun)
	(mathematics) calculation of the value of a function outside the range of known values
	an inference about the future (or about some hypothetical situation) based on known facts and observations

extrapolate (verb)	extrapolation (verb)
estimate the value of something based on known values
gain knowledge of (an area not known or experienced) by extrapolating
draw from specific cases for more general cases