narcissus vs daffodil

narcissus and daffodil both are nouns.

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

As nouns, daffodil is a hyponym of narcissus; that is, daffodil is a word with a more specific, narrower meaning than narcissus:

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

Other hyponyms of narcissus include Narcissus pseudonarcissus, jonquil, Narcissus jonquilla.

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