comparison vs examination

comparison and examination both are nouns.

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

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

Other hypernyms of comparison include scrutiny.

comparison (noun)	examination (noun)
the act of examining resemblances	the act of examining something closely (as for mistakes)
qualities that are comparable	the act of giving students or candidates a test (as by questions) to determine what they know or have learned
relation based on similarities and differences	a detailed inspection of your conscience (as done daily by Jesuits)
	a set of questions or exercises evaluating skill or knowledge
	formal systematic questioning