pit bull terrier vs American Staffordshire terrier

pit bull terrier and American Staffordshire terrier both are nouns.

Word	Noun	Adjective	Verb	Adverb
pit bull terrier	Yes	No	No	No
American Staffordshire terrier	Yes	No	No	No

As nouns, pit bull terrier and American Staffordshire terrier are synonyms defined as:

pit bull terrier and American Staffordshire terrier: American breed of muscular terriers with a short close-lying stiff coat

Other synonyms of pit bull terrier include American pit bull terrier, Staffordshire terrier.

pit bull terrier (noun)	American Staffordshire terrier (noun)
American breed of muscular terriers with a short close-lying stiff coat	American breed of muscular terriers with a short close-lying stiff coat