examination vs interrogatory

examination and interrogatory both are nouns.

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

As nouns, examination and interrogatory are synonyms defined as:

Other synonyms of examination include interrogation.

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

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