tenderloin vs combat zone

tenderloin and combat zone both are nouns.

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

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

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

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