checkup vs medical examination

checkup and medical examination both are nouns.

Word	Noun	Adjective	Verb	Adverb
checkup	Yes	No	No	No
medical examination	Yes	No	No	No

As nouns, checkup and medical examination are synonyms defined as:

checkup and medical examination: a thorough physical examination; includes a variety of tests depending on the age and sex and health of the person

Other synonyms of checkup include health check, medical, medical checkup, medical exam.

checkup (noun)	medical examination (noun)
a thorough physical examination; includes a variety of tests depending on the age and sex and health of the person	a thorough physical examination; includes a variety of tests depending on the age and sex and health of the person