combat zone vs tenderloin

combat zone and tenderloin both are nouns.

Word	Noun	Adjective	Verb	Adverb
combat zone	Yes	No	No	No
tenderloin	Yes	No	No	No

As nouns, combat zone and tenderloin are synonyms defined as:

combat zone and tenderloin: a city district known for its vice and high crime rate

combat zone (noun)	tenderloin (noun)
a military area where combat forces operate	the tender meat of the loin muscle on each side of the vertebral column
a city district known for its vice and high crime rate	a city district known for its vice and high crime rate