health check vs checkup

health check and checkup both are nouns.

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

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

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

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

health check (noun)	checkup (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