possum oak vs water oak

possum oak and water oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
possum oak	Yes	No	No	No
water oak	Yes	No	No	No

As nouns, possum oak and water oak are synonyms defined as:

possum oak and water oak: relatively tall deciduous water oak of southeastern United States often cultivated as a shade tree; thrives in wet soil

Other synonyms of possum oak include Quercus nigra.

possum oak (noun)	water oak (noun)
relatively tall deciduous water oak of southeastern United States often cultivated as a shade tree; thrives in wet soil	relatively tall deciduous water oak of southeastern United States often cultivated as a shade tree; thrives in wet soil