maiden vs demoiselle

maiden and demoiselle both are nouns.

Word	Noun	Adjective	Verb	Adverb
maiden	Yes	Yes	No	No
demoiselle	Yes	No	No	No

As nouns, demoiselle is a hyponym of maiden; that is, demoiselle is a word with a more specific, narrower meaning than maiden:

Other hyponyms of maiden include damoiselle, damosel, damozel, damsel.

maiden (noun)	demoiselle (noun)
an unmarried girl (especially a virgin)	small brilliantly colored tropical marine fishes of coral reefs
(cricket) an over in which no runs are scored	a young unmarried woman

maiden (adjective)	demoiselle (adjective)
serving to set in motion