put down vs fill out

put down and fill out both are verbs.

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

put down (verb)	fill out (verb)
put down in writing; of texts, musical compositions, etc.	become round, plump, or shapely
make a record of; set down in permanent form	make bigger or better or more complete
put in a horizontal position	write all the required information onto a form
remove (cargo, people, etc.) from and leave	make fat or plump
cause to sit or seat or be in a settled position or place	line or stuff with soft material
put (an animal) to death	supplement what is thought to be deficient
reduce in worth or character, usually verbally
cause to come to the ground