oak

oak /ˈoʊk/ noun
plural oaks or oak
oak
/ˈoʊk/
noun
plural oaks or oak
Britannica Dictionary definition of OAK
1 
[count] : a type of tree that grows in northern parts of the world and that produces acorns
— called also oak tree
— see also poison oak
2 
[noncount] : the wood of an oak tree

— oaken

/ˈoʊkən/ adjective, always used before a noun