bay wreath vs wreath

bay wreath and wreath both are nouns.

Word	Noun	Adjective	Verb	Adverb
bay wreath	Yes	No	No	No
wreath	Yes	No	No	No

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

bay wreath: (antiquity) a wreath of laurel foliage worn on the head as an emblem of victory
wreath: flower arrangement consisting of a circular band of foliage or flowers for ornamental purposes

Other hypernyms of bay wreath include chaplet, coronal, garland, lei.

bay wreath (noun)	wreath (noun)
(antiquity) a wreath of laurel foliage worn on the head as an emblem of victory	flower arrangement consisting of a circular band of foliage or flowers for ornamental purposes