estimate vs penalize

estimate is a noun but penalize is not a noun.

Word	Noun	Adjective	Verb	Adverb
estimate	Yes	No	Yes	No
penalize	No	No	Yes	No

estimate (noun)	penalize (noun)
a judgment of the qualities of something or somebody
an approximate calculation of quantity or degree or worth
the respect with which a person is held
a document appraising the value of something (as for insurance or taxation)
a statement indicating the likely cost of some job

estimate (verb)	penalize (verb)
judge tentatively or form an estimate of (quantities or time)	impose a penalty on; inflict punishment on
judge to be probable