ship route vs Saint Lawrence Seaway

ship route and Saint Lawrence Seaway both are nouns.

Word	Noun	Adjective	Verb	Adverb
ship route	Yes	No	No	No
Saint Lawrence Seaway	Yes	No	No	No

ship route (noun)	Saint Lawrence Seaway (noun)
a lane at sea that is a regularly used route for vessels	a seaway involving the Saint Lawrence River and the Great Lakes that was developed jointly by Canada and the United States; oceangoing ships can travel as far west as Lake Superior