checkout vs checkout counter

checkout and checkout counter both are nouns.

Word	Noun	Adjective	Verb	Adverb
checkout	Yes	No	No	No
checkout counter	Yes	No	No	No

As nouns, checkout and checkout counter are synonyms defined as:

checkout and checkout counter: a counter in a supermarket where you pay for your purchases

checkout (noun)	checkout counter (noun)
the act of inspecting or verifying	a counter in a supermarket where you pay for your purchases
a counter in a supermarket where you pay for your purchases
the latest time for vacating a hotel room