checkout vs checkout time

checkout and checkout time both are nouns.

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

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

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