mirasol vs sunflower

mirasol and sunflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
mirasol	Yes	No	No	No
sunflower	Yes	No	No	No

As nouns, sunflower is a hypernym of mirasol; that is, sunflower is a word with a broader meaning than mirasol:

mirasol: annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America
sunflower: any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays

Other hypernyms of mirasol include helianthus.

mirasol (noun)	sunflower (noun)
annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America	any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays