century plant vs xerophyte

century plant and xerophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
century plant	Yes	No	No	No
xerophyte	Yes	No	No	No

As nouns, xerophyte is a hypernym of century plant; that is, xerophyte is a word with a broader meaning than century plant:

century plant: tropical American plants with basal rosettes of fibrous sword-shaped leaves and flowers in tall spikes; some cultivated for ornament or for fiber
xerophyte: plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte

Other hypernyms of century plant include desert plant, xerophile, xerophilous plant, xerophytic plant.

century plant (noun)	xerophyte (noun)
tropical American plants with basal rosettes of fibrous sword-shaped leaves and flowers in tall spikes; some cultivated for ornament or for fiber	plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte