swag vs drop down

swag is a noun but drop down is not a noun.

Word	Noun	Adjective	Verb	Adverb
swag	Yes	No	Yes	No
drop down	No	No	Yes	No

As verbs, drop down is a hypernym of swag; that is, drop down is a word with a broader meaning than swag:

swag: droop, sink, or settle from or as if from pressure or loss of tautness
drop down: fall or descend to a lower place or level

Other hypernyms of swag include drop, sink.

swag (noun)	drop down (noun)
a bundle containing the personal belongings of a swagman
goods or money obtained illegally
valuable goods

swag (verb)	drop down (verb)
sway heavily or unsteadily	fall or descend to a lower place or level
walk as if unable to control one's movements
droop, sink, or settle from or as if from pressure or loss of tautness