hub-and-spoke system vs hub-and-spoke

hub-and-spoke system and hub-and-spoke both are nouns.

Word	Noun	Adjective	Verb	Adverb
hub-and-spoke system	Yes	No	No	No
hub-and-spoke	Yes	No	No	No

As nouns, hub-and-spoke system and hub-and-spoke are synonyms defined as:

hub-and-spoke system and hub-and-spoke: a system of air transportation in which local airports offer air transportation to a central airport where long-distance flights are available

hub-and-spoke system (noun)	hub-and-spoke (noun)
a system of air transportation in which local airports offer air transportation to a central airport where long-distance flights are available	a system of air transportation in which local airports offer air transportation to a central airport where long-distance flights are available