spot check vs checkout

spot check and checkout both are nouns.

Word	Noun	Adjective	Verb	Adverb
spot check	Yes	No	No	No
checkout	Yes	No	No	No

As nouns, checkout is a hypernym of spot check; that is, checkout is a word with a broader meaning than spot check:

spot check: a check on work performance or product quality made at random times without warning
checkout: the act of inspecting or verifying

Other hypernyms of spot check include check-out procedure, check.

spot check (noun)	checkout (noun)
a check on work performance or product quality made at random times without warning	the act of inspecting or verifying
	a counter in a supermarket where you pay for your purchases
	the latest time for vacating a hotel room