stretcher: a wooden framework on which canvas is stretched and fixed for oil painting
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
fagaceae: chiefly monoecious trees and shrubs: beeches; chestnuts; oaks; genera Castanea, Castanopsis, Chrysolepis, Fagus, Lithocarpus, Nothofagus, Quercus