plonk vs plank

plonk and plank both are nouns.

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

As verbs, plonk and plank are synonyms defined as:

plonk and plank: set (something or oneself) down with or as if with a noise

Other synonyms of plonk include flump, plop, plump, plump down, plunk, plunk down.

plonk (noun)	plank (noun)
the noise of something dropping (as into liquid)	an endorsed policy in the platform of a political party
a cheap wine of inferior quality	a stout length of sawn timber; made in a wide variety of sizes and used for many purposes

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