American English vs turnpike

American English and turnpike both are nouns.

Word	Noun	Adjective	Verb	Adverb
American English	Yes	No	No	No
turnpike	Yes	No	No	No

American English (noun)	turnpike (noun)
the English language as used in the United States	an expressway on which tolls are collected
	(from 16th to 19th centuries) gates set across a road to prevent passage until a toll had been paid