coronal vs bay wreath

coronal and bay wreath both are nouns.

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

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

coronal: 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 coronal include crown, laurel, laurel wreath.

coronal (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