Agave sisalana vs agave

Agave sisalana and agave both are nouns.

Word	Noun	Adjective	Verb	Adverb
Agave sisalana	Yes	No	No	No
agave	Yes	No	No	No

As nouns, agave is a hypernym of Agave sisalana; that is, agave is a word with a broader meaning than Agave sisalana:

Agave sisalana: Mexican or West Indian plant with large fleshy leaves yielding a stiff fiber used in e.g. rope
agave: tropical American plants with basal rosettes of fibrous sword-shaped leaves and flowers in tall spikes; some cultivated for ornament or for fiber

Other hypernyms of Agave sisalana include American aloe, century plant.

Agave sisalana (noun)	agave (noun)
Mexican or West Indian plant with large fleshy leaves yielding a stiff fiber used in e.g. rope	tropical American plants with basal rosettes of fibrous sword-shaped leaves and flowers in tall spikes; some cultivated for ornament or for fiber