Synonyms for Purple Amaranth (same or very similar meaning)
WordNet sense 1 (tall showy tropical American annual having hairy stems and long spikes of usually red flowers above leaves deeply flushed with purple; seeds often used as cereal):
gentleman's-cane, prince's-feather, prince's-plume, Amaranthus cruentus, Amaranthus hybridus erythrostachys, Amaranthus hybridus hypochondriacus, red amaranthFrom the ODE community, based on WordNetadd/edit