valley oak vs valley white oak

valley oak and valley white oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
valley oak	Yes	No	No	No
valley white oak	Yes	No	No	No

As nouns, valley oak and valley white oak are synonyms defined as:

valley oak and valley white oak: tall graceful deciduous California oak having leathery leaves and slender pointed acorns

Other synonyms of valley oak include California white oak, Quercus lobata, roble.

valley oak (noun)	valley white oak (noun)
tall graceful deciduous California oak having leathery leaves and slender pointed acorns	tall graceful deciduous California oak having leathery leaves and slender pointed acorns