California bay tree vs laurel

California bay tree and laurel both are nouns.

Word	Noun	Adjective	Verb	Adverb
California bay tree	Yes	No	No	No
laurel	Yes	No	No	No

As nouns, laurel is a hypernym of California bay tree; that is, laurel is a word with a broader meaning than California bay tree:

California bay tree: Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood
laurel: any of various aromatic trees of the laurel family

California bay tree (noun)	laurel (noun)
Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood	(antiquity) a wreath of laurel foliage worn on the head as an emblem of victory
	any of various aromatic trees of the laurel family