garboard plank vs garboard strake

garboard plank and garboard strake both are nouns.

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

As nouns, garboard plank and garboard strake are synonyms defined as:

garboard plank and garboard strake: the first wale laid next to the keel of a wooden ship

Other synonyms of garboard plank include garboard.

garboard plank (noun)	garboard strake (noun)
the first wale laid next to the keel of a wooden ship	the first wale laid next to the keel of a wooden ship