This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Made from the wood of the oak tree

adj. Made or consisting of oaks or of the wood of oaks.

Made of oak; consisting of oak-trees, or of branches, leaves, or wood, etc., of the oak: as, an oaken plank or bench.

adj. consisting of or made of wood of the oak tree

"The example he gave was "oaken", which is not quite the same as "made of oak"."

woody   

oak   

wooden    worm-eaten    teak    rickety    mahogany    upright    wrought iron    ironbound    unpainted    high-backed