plank vs strake

plank and strake both are nouns.

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

As nouns, strake is a hyponym of plank; that is, strake is a word with a more specific, narrower meaning than plank:

plank: a stout length of sawn timber; made in a wide variety of sizes and used for many purposes
strake: thick plank forming a ridge along the side of a wooden ship

Other hyponyms of plank include matchboard, skid, wale, chipboard, hardboard, deal.

plank (noun)	strake (noun)
an endorsed policy in the platform of a political party	thick plank forming a ridge along the side of a wooden ship
a stout length of sawn timber; made in a wide variety of sizes and used for many purposes

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