knothole vs plank

knothole and plank both are nouns.

Word	Noun	Adjective	Verb	Adverb
knothole	Yes	No	No	No
plank	Yes	No	Yes	No

knothole (noun)	plank (noun)
a hole in a board where a knot came out	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

knothole (verb)	plank (verb)
	cook and serve on a plank
	cover with planks
	set (something or oneself) down with or as if with a noise