set down vs crash land

set down and crash land both are verbs.

Word	Noun	Adjective	Verb	Adverb
set down	No	No	Yes	No
crash land	No	No	Yes	No

As verbs, crash land is a hyponym of set down; that is, crash land is a word with a more specific, narrower meaning than set down:

set down (verb)	crash land (verb)
put down in writing; of texts, musical compositions, etc.	make an emergency landing
remove (cargo, people, etc.) from and leave
put or settle into a position
cause to sit or seat or be in a settled position or place
go ashore
reach or come to rest