sheep laurel vs kalmia

sheep laurel and kalmia both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheep laurel	Yes	No	No	No
kalmia	Yes	No	No	No

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

sheep laurel: North American dwarf shrub resembling mountain laurel but having narrower leaves and small red flowers; poisonous to young stock
kalmia: any plant of the genus Kalmia

sheep laurel (noun)	kalmia (noun)
North American dwarf shrub resembling mountain laurel but having narrower leaves and small red flowers; poisonous to young stock	any plant of the genus Kalmia