fumed oak vs oak

fumed oak and oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
fumed oak	Yes	No	No	No
oak	Yes	No	No	No

As nouns, oak is a hypernym of fumed oak; that is, oak is a word with a broader meaning than fumed oak:

fumed oak: oak given a weathered appearance by exposure to fumes of ammonia; used for cabinetwork
oak: the hard durable wood of any oak; used especially for furniture and flooring

fumed oak (noun)	oak (noun)
oak given a weathered appearance by exposure to fumes of ammonia; used for cabinetwork	a deciduous tree of the genus Quercus; has acorns and lobed leaves
	the hard durable wood of any oak; used especially for furniture and flooring