bay wreath vs chaplet

bay wreath and chaplet both are nouns.

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

As nouns, chaplet is a hypernym of bay wreath; that is, chaplet 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
chaplet: flower arrangement consisting of a circular band of foliage or flowers for ornamental purposes

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

bay wreath (noun)	chaplet (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