reexamination vs reexamine

reexamination is a noun but reexamine is not a noun.

Word	Noun	Adjective	Verb	Adverb
reexamination	Yes	No	No	No
reexamine	No	No	Yes	No

reexamination (noun)	reexamine (noun)
a subsequent examination of a patient for the purpose of monitoring earlier treatment
(law) questioning of a witness by the party that called the witness after that witness has been subject to cross-examination

reexamination (verb)	reexamine (verb)
	look at again; examine again