pepperidge vs sour gum

pepperidge and sour gum both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepperidge	Yes	No	No	No
sour gum	Yes	No	No	No

As nouns, pepperidge and sour gum are synonyms defined as:

pepperidge and sour gum: columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall

Other synonyms of pepperidge include black gum, Nyssa sylvatica.

pepperidge (noun)	sour gum (noun)
columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall	columnar tree of eastern North America having horizontal limbs and small leaves that emerge late in spring and have brilliant color in early fall