Spanish dagger vs yucca

Spanish dagger and yucca both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spanish dagger	Yes	No	No	No
yucca	Yes	No	No	No

As nouns, yucca is a hypernym of Spanish dagger; that is, yucca is a word with a broader meaning than Spanish dagger:

Spanish dagger: arborescent yucca of southwestern United States and northern Mexico with sword-shaped leaves and white flowers
yucca: any of several evergreen plants of the genus Yucca having usually tall stout stems and a terminal cluster of white flowers; warmer regions of North America

As nouns, yucca is a hypernym of Spanish dagger; that is, yucca is a word with a broader meaning than Spanish dagger:

Spanish dagger: yucca of southeastern United States similar to the Spanish bayonets but with shorter trunk and smoother leaves
yucca: any of several evergreen plants of the genus Yucca having usually tall stout stems and a terminal cluster of white flowers; warmer regions of North America

Spanish dagger (noun)	yucca (noun)
arborescent yucca of southwestern United States and northern Mexico with sword-shaped leaves and white flowers	any of several evergreen plants of the genus Yucca having usually tall stout stems and a terminal cluster of white flowers; warmer regions of North America
yucca of southeastern United States similar to the Spanish bayonets but with shorter trunk and smoother leaves