check-out procedure vs checkout

check-out procedure and checkout both are nouns.

Word	Noun	Adjective	Verb	Adverb
check-out procedure	Yes	No	No	No
checkout	Yes	No	No	No

As nouns, check-out procedure and checkout are synonyms defined as:

Other synonyms of check-out procedure include check.

check-out procedure (noun)	checkout (noun)
the act of inspecting or verifying	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