laurel wreath vs lei

laurel wreath and lei both are nouns.

Word	Noun	Adjective	Verb	Adverb
laurel wreath	Yes	No	No	No
lei	Yes	No	No	No

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

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

Other hypernyms of laurel wreath include chaplet, coronal, garland, wreath.

laurel wreath (noun)	lei (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
an award for winning a championship or commemorating some other event