notturno vs nocturne

notturno and nocturne both are nouns.

Word	Noun	Adjective	Verb	Adverb
notturno	Yes	No	No	No
nocturne	Yes	No	No	No

As nouns, notturno and nocturne are synonyms defined as:

notturno and nocturne: a pensive lyrical piece of music (especially for the piano)

notturno (noun)	nocturne (noun)
a pensive lyrical piece of music (especially for the piano)	a pensive lyrical piece of music (especially for the piano)