Synonyms for Iris (same or very similar meaning)
WordNet sense 1 (plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals):
flag, fleur-de-lis, sword lilyWordNet sense 2 (diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening):
iris diaphragmFrom the ODE community, based on WordNetadd/edit