Belsen vs Bergen-Belsen concentration camp

Belsen and Bergen-Belsen concentration camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
Belsen	Yes	No	No	No
Bergen-Belsen concentration camp	Yes	No	No	No

As nouns, Belsen and Bergen-Belsen concentration camp are synonyms defined as:

Belsen and Bergen-Belsen concentration camp: a Nazi concentration camp for Jews created in northwestern Germany during World War II

Belsen (noun)	Bergen-Belsen concentration camp (noun)
a Nazi concentration camp for Jews created in northwestern Germany during World War II	a Nazi concentration camp for Jews created in northwestern Germany during World War II