fill in vs set down

fill in and set down both are verbs.

Word	Noun	Adjective	Verb	Adverb
fill in	No	No	Yes	No
set down	No	No	Yes	No

fill in (verb)	set down (verb)
supply with information on a specific topic	put down in writing; of texts, musical compositions, etc.
write all the required information onto a form	remove (cargo, people, etc.) from and leave
represent the effect of shade or shadow on	put or settle into a position
be a substitute	cause to sit or seat or be in a settled position or place
	go ashore
	reach or come to rest