midterm vs midterm examination

midterm and midterm examination both are nouns.

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

As nouns, midterm and midterm examination are synonyms defined as:

midterm and midterm examination: an examination administered in the middle of an academic term

Other synonyms of midterm include midterm exam.

midterm (noun)	midterm examination (noun)
an examination administered in the middle of an academic term	an examination administered in the middle of an academic term
middle of an academic term or a political term in office
the middle of the gestation period