reexamination vs examination

reexamination and examination both are nouns.

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

As nouns, examination is a hypernym of reexamination; that is, examination is a word with a broader meaning than reexamination:

reexamination: a subsequent examination of a patient for the purpose of monitoring earlier treatment
examination: the act of examining something closely (as for mistakes)

Other hypernyms of reexamination include scrutiny.

As nouns, examination is a hypernym of reexamination; that is, examination is a word with a broader meaning than reexamination:

reexamination: (law) questioning of a witness by the party that called the witness after that witness has been subject to cross-examination
examination: formal systematic questioning

Other hypernyms of reexamination include interrogation, interrogatory.

reexamination (noun)	examination (noun)
a subsequent examination of a patient for the purpose of monitoring earlier treatment	the act of examining something closely (as for mistakes)
(law) questioning of a witness by the party that called the witness after that witness has been subject to cross-examination	the act of giving students or candidates a test (as by questions) to determine what they know or have learned
	a detailed inspection of your conscience (as done daily by Jesuits)
	a set of questions or exercises evaluating skill or knowledge
	formal systematic questioning