A flower is the part of a plant which is often brightly coloured, grows at the end of a stem, and only survives for a short time. Each individual flower is tiny. ... large, purplish-blue flowers. Synonyms: bloom, blossom, efflorescence More Synonyms of flower. The primary purpose of a flower is reproduction. Since the flowers are the reproductive organs of plant, they mediate the joining of the sperm, contained within pollen, to the ovules — contained in the ovary. Pollination is the movement of pollen from the anthers to the stigma.... See more