trade route vs sea lane

trade route and sea lane both are nouns.

Word	Noun	Adjective	Verb	Adverb
trade route	Yes	No	No	No
sea lane	Yes	No	No	No

As nouns, trade route and sea lane are synonyms defined as:

trade route and sea lane: a lane at sea that is a regularly used route for vessels

Other synonyms of trade route include seaway, ship route.

trade route (noun)	sea lane (noun)
a lane at sea that is a regularly used route for vessels	a lane at sea that is a regularly used route for vessels
a route followed by traders (usually in caravans)