exam vs examination

exam and examination both are nouns.

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

As nouns, exam and examination are synonyms defined as:

exam and examination: a set of questions or exercises evaluating skill or knowledge

Other synonyms of exam include test.

exam (noun)	examination (noun)
a set of questions or exercises evaluating skill or knowledge	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