garboard strake vs garboard plank

garboard strake and garboard plank both are nouns.

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

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

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

Other synonyms of garboard strake include garboard.

garboard strake (noun)	garboard plank (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