interpolate vs interpolation

interpolate is not a noun while interpolation is a noun.

Word	Noun	Adjective	Verb	Adverb
interpolate	No	No	Yes	No
interpolation	Yes	No	No	No

interpolate (noun)	interpolation (noun)
	the action of interjecting or interposing an action or remark that interrupts
	(mathematics) calculation of the value of a function between the values already known
	a message (spoken or written) that is introduced or inserted

interpolate (verb)	interpolation (verb)
insert words into texts, often falsifying it thereby
estimate the value of something based on known values