Herrenvolk vs master race

Herrenvolk and master race both are nouns.

Word	Noun	Adjective	Verb	Adverb
Herrenvolk	Yes	No	No	No
master race	Yes	No	No	No

As nouns, Herrenvolk and master race are synonyms defined as:

Herrenvolk and master race: a race that considers itself superior to all others and fitted to rule the others

Herrenvolk (noun)	master race (noun)
a race that considers itself superior to all others and fitted to rule the others	a race that considers itself superior to all others and fitted to rule the others