write down vs dash down

write down and dash down both are verbs.

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

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

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

write down (verb)	dash down (verb)
reduce the estimated value of something	write down hastily
put down in writing; of texts, musical compositions, etc.