valley oak vs Quercus lobata

valley oak and Quercus lobata both are nouns.

Word	Noun	Adjective	Verb	Adverb
valley oak	Yes	No	No	No
Quercus lobata	Yes	No	No	No

As nouns, valley oak and Quercus lobata are synonyms defined as:

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

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

valley oak (noun)	Quercus lobata (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