Duc d'Elchingen vs Michel Ney

Duc d'Elchingen and Michel Ney both are nouns.

Word	Noun	Adjective	Verb	Adverb
Duc d'Elchingen	Yes	No	No	No
Michel Ney	Yes	No	No	No

As nouns, Duc d'Elchingen and Michel Ney are synonyms defined as:

Duc d'Elchingen and Michel Ney: French marshal in the Napoleonic Wars (1769-1815)

Other synonyms of Duc d'Elchingen include Ney.

Duc d'Elchingen (noun)	Michel Ney (noun)
French marshal in the Napoleonic Wars (1769-1815)	French marshal in the Napoleonic Wars (1769-1815)