unload vs set down

unload and set down both are verbs.

Word	Noun	Adjective	Verb	Adverb
unload	No	No	Yes	No
set down	No	No	Yes	No

As verbs, unload and set down are synonyms defined as:

Other synonyms of unload include discharge, drop, drop off, put down.

unload (verb)	set down (verb)
remove the load from (a container or vehicle)	put down in writing; of texts, musical compositions, etc.
remove (cargo, people, etc.) from and leave	remove (cargo, people, etc.) from and leave
	put or settle into a position
	cause to sit or seat or be in a settled position or place
	go ashore
	reach or come to rest