sour gum vs pepperidge

sour gum and pepperidge both are nouns.

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

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

sour gum and pepperidge: 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 sour gum include black gum, Nyssa sylvatica.

sour gum (noun)	pepperidge (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