set down vs air-drop

set down and air-drop both are verbs.

Word	Noun	Adjective	Verb	Adverb
set down	No	No	Yes	No
air-drop	No	No	Yes	No

As verbs, air-drop is a hyponym of set down; that is, air-drop is a word with a more specific, narrower meaning than set down:

Other hyponyms of set down include wharf.

set down (verb)	air-drop (verb)
put down in writing; of texts, musical compositions, etc.	drop (an object) from the air; unload from a plane or helicopter
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