oak is a crossword puzzle answer that we have spotted 20 times. Tree Acorn tree large tree Winery wood sturdy tree Durable wood Hardwood tree Furniture wood Deciduous tree Durable hardwood Tree with acorns Bourbon flavoring acorn-bearing tree Common forest tree Traditional British tree sturdy building material Sylvan symbol of strength natural symbol of durability Common contents of bookcases do a kind deed with bits of a tree