daffodil vs jonquil

daffodil and jonquil both are nouns.

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

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

daffodil: any of numerous varieties of Narcissus plants having showy often yellow flowers with a trumpet-shaped central crown
jonquil: often used colloquially for any yellow daffodil

Other hyponyms of daffodil include Narcissus papyraceus, paper white.

daffodil (noun)	jonquil (noun)
any of numerous varieties of Narcissus plants having showy often yellow flowers with a trumpet-shaped central crown	widely cultivated ornamental plant native to southern Europe but naturalized elsewhere having fragrant yellow or white clustered flowers
	often used colloquially for any yellow daffodil