get down vs write down

get down and write down both are verbs.

Word	Noun	Adjective	Verb	Adverb
get down	No	No	Yes	No
write down	No	No	Yes	No

As verbs, get down and write down are synonyms defined as:

get down and write down: put down in writing; of texts, musical compositions, etc.

Other synonyms of get down include put down, set down.

get down (verb)	write down (verb)
take the first step or steps in carrying out an action	reduce the estimated value of something
put down in writing; of texts, musical compositions, etc.	put down in writing; of texts, musical compositions, etc.
pass through the esophagus as part of eating or drinking
lower someone's spirits; make downhearted
move something or somebody to a lower position
alight from (a horse)
lower (one's body) as by kneeling