system of logic vs extrapolate

system of logic is a noun but extrapolate is not a noun.

Word	Noun	Adjective	Verb	Adverb
system of logic	Yes	No	No	No
extrapolate	No	No	Yes	No

system of logic (noun)	extrapolate (noun)
a system of reasoning

system of logic (verb)	extrapolate (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