plank vs set down

plank is a noun but set down is not a noun.

Word	Noun	Adjective	Verb	Adverb
plank	Yes	No	Yes	No
set down	No	No	Yes	No

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

Other hypernyms of plank include place down, put down.

plank (noun)	set down (noun)
an endorsed policy in the platform of a political party
a stout length of sawn timber; made in a wide variety of sizes and used for many purposes

plank (verb)	set down (verb)
cook and serve on a plank	put down in writing; of texts, musical compositions, etc.
cover with planks	remove (cargo, people, etc.) from and leave
set (something or oneself) down with or as if with a noise	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