slave traffic vs slave trade

slave traffic and slave trade both are nouns.

Word	Noun	Adjective	Verb	Adverb
slave traffic	Yes	No	No	No
slave trade	Yes	No	No	No

As nouns, slave traffic and slave trade are synonyms defined as:

slave traffic and slave trade: traffic in slaves; especially in Black Africans transported to America in the 16th to 19th centuries

slave traffic (noun)	slave trade (noun)
traffic in slaves; especially in Black Africans transported to America in the 16th to 19th centuries	traffic in slaves; especially in Black Africans transported to America in the 16th to 19th centuries