impute vs imputation

impute is not a noun while imputation is a noun.

Word	Noun	Adjective	Verb	Adverb
impute	No	No	Yes	No
imputation	Yes	No	No	No

impute (noun)	imputation (noun)
	the attribution to a source or cause
	a statement attributing something dishonest (especially a criminal offense)

impute (verb)	imputation (verb)
attribute or credit to
attribute (responsibility or fault) to a cause or source