Century plant and Sisal

Century plant noun - Tropical American plants with basal rosettes of fibrous sword-shaped leaves and flowers in tall spikes; some cultivated for ornament or for fiber.

Sisal and century plant are semantically related. In some cases you can replace term "Sisal" with "Century plant", this terms are similar.

Sisal noun - Mexican or West Indian plant with large fleshy leaves yielding a stiff fiber used in e.g. rope.

Century plant and sisal are semantically related. You can use "Century plant" instead a noun "Sisal".