set down vs fill in

set down and fill in both are verbs.

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

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