checkup vs health check

checkup and health check both are nouns.

Word	Noun	Adjective	Verb	Adverb
checkup	Yes	No	No	No
health check	Yes	No	No	No

As nouns, checkup and health check are synonyms defined as:

checkup and health check: 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 medical, medical checkup, medical exam, medical examination.

checkup (noun)	health check (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