Quick Quiz: Nouns Score: Change category, Flip order Reset Incorrect! Try again. Noun: growth ring Your choice? an annual formation of wood in plants as they grow medicinal resin from the lignum vitae tree a warship (at anchor or under way) required to maintain a higher degree of readiness than others in its squadron   (Noun: guard ship) deciduous thicket-forming Old World shrub with clusters of white flowers and small bright red berries