soubrette vs minor role

soubrette and minor role both are nouns.

Word	Noun	Adjective	Verb	Adverb
soubrette	Yes	No	No	No
minor role	Yes	No	No	No

As nouns, minor role is a hypernym of soubrette; that is, minor role is a word with a broader meaning than soubrette:

soubrette: a minor female role as a pert flirtatious lady's maid in a comedy
minor role: a small role

Other hypernyms of soubrette include bit part.

soubrette (noun)	minor role (noun)
a minor female role as a pert flirtatious lady's maid in a comedy	a small role
a pert or flirtatious young girl