daffodil vs narcissus

daffodil and narcissus both are nouns.

Word	Noun	Adjective	Verb	Adverb
daffodil	Yes	No	No	No
narcissus	Yes	No	No	No

As nouns, narcissus is a hypernym of daffodil; that is, narcissus is a word with a broader meaning than daffodil:

daffodil: any of numerous varieties of Narcissus plants having showy often yellow flowers with a trumpet-shaped central crown
narcissus: bulbous plant having erect linear leaves and showy yellow or white flowers either solitary or in clusters

daffodil (noun)	narcissus (noun)
any of numerous varieties of Narcissus plants having showy often yellow flowers with a trumpet-shaped central crown	bulbous plant having erect linear leaves and showy yellow or white flowers either solitary or in clusters