fill in vs put down

fill in and put down both are verbs.

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

fill in (verb)	put 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	make a record of; set down in permanent form
represent the effect of shade or shadow on	put in a horizontal position
be a substitute	remove (cargo, people, etc.) from and leave
	cause to sit or seat or be in a settled position or place
	put (an animal) to death
	reduce in worth or character, usually verbally
	cause to come to the ground