chaplet vs bay wreath

chaplet and bay wreath both are nouns.

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

As nouns, bay wreath is a hyponym of chaplet; that is, bay wreath is a word with a more specific, narrower meaning than chaplet:

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

Other hyponyms of chaplet include crown, laurel, laurel wreath.

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