sour-gum family vs tupelo family

sour-gum family and tupelo family both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour-gum family	Yes	No	No	No
tupelo family	Yes	No	No	No

As nouns, sour-gum family and tupelo family are synonyms defined as:

sour-gum family and tupelo family: a family of dicotyledonous trees of order Myrtales that includes the sour gum trees

Other synonyms of sour-gum family include family Nyssaceae, Nyssaceae.

sour-gum family (noun)	tupelo family (noun)
a family of dicotyledonous trees of order Myrtales that includes the sour gum trees	a family of dicotyledonous trees of order Myrtales that includes the sour gum trees