sea lane vs St. Lawrence Seaway

sea lane and St. Lawrence Seaway both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea lane	Yes	No	No	No
St. Lawrence Seaway	Yes	No	No	No

sea lane (noun)	St. 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