get down vs dash off

get down and dash off both are verbs.

Word	Noun	Adjective	Verb	Adverb
get down	No	No	Yes	No
dash off	No	No	Yes	No

As verbs, dash off is a hyponym of get down; that is, dash off is a word with a more specific, narrower meaning than get down:

Other hyponyms of get down include transcribe, notate, dash down, note, take down.

get down (verb)	dash off (verb)
take the first step or steps in carrying out an action	write down hastily
put down in writing; of texts, musical compositions, etc.	write quickly
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