Answer: oak

AnswerCrossword Clue
OAK

Shade tree

OAK

Bookshelf wood

OAK

Bucket wood

OAK
... Hill (James Monroe's home)
OAK
Flooring material
OAKIowa's state tree
OAKCabinet material
OAKWood used in wine barrels
OAKSymbol of might
OAKDesk wood
OAKTree held sacred by druids
OAKYellow-ribboned tree?
OAKWood flooring option
OAKFlooring option
OAKSymbol of mightiness
OAKPlant on a Connecticut quarter
OAKBookcase material
OAKEx-acorn
OAKWine cask wood
OAKExemplar of solidity
OAKAcorn maker
OAKErstwhile acorn
OAKSturdy tree
OAKTree known as "king of the forest"
OAKDurable wood
OAKMilitary-insignia leaf
OAKWine-barrel wood
OAKCask material
OAKBourbon-barrel wood
OAKAcorn's destiny
OAKHard wood
OAKMighty tree
OAKSturdy wood
OAKSymbol of strength
OAKAcorn producer
OAKAcorn, ultimately
OAKGrown-up acorn
OAKYellow-ribbon tree of song
OAKSquirrel's hangout
OAKDresser wood