interrogatory vs examination

interrogatory and examination both are nouns.

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

As nouns, interrogatory and examination are synonyms defined as:

Other synonyms of interrogatory include interrogation.

interrogatory (noun)	examination (noun)
formal systematic questioning	the act of examining something closely (as for mistakes)
	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

interrogatory (adjective)	examination (adjective)
relating to the use of or having the nature of an interrogation