examination vs midterm

examination and midterm both are nouns.

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

As nouns, midterm is a hyponym of examination; that is, midterm is a word with a more specific, narrower meaning than examination:

examination (noun)	midterm (noun)
the act of examining something closely (as for mistakes)	an examination administered in the middle of an academic term
the act of giving students or candidates a test (as by questions) to determine what they know or have learned	middle of an academic term or a political term in office
a detailed inspection of your conscience (as done daily by Jesuits)	the middle of the gestation period
a set of questions or exercises evaluating skill or knowledge
formal systematic questioning