tupelo family vs sour-gum family

tupelo family and sour-gum family both are nouns.

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

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

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

Other synonyms of tupelo family include family Nyssaceae, Nyssaceae.

tupelo family (noun)	sour-gum 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