G clef vs treble staff

G clef and treble staff both are nouns.

Word	Noun	Adjective	Verb	Adverb
G clef	Yes	No	No	No
treble staff	Yes	No	No	No

As nouns, G clef and treble staff are synonyms defined as:

G clef and treble staff: a clef that puts the G above middle C on the second line of a staff

Other synonyms of G clef include treble clef.

G clef (noun)	treble staff (noun)
a clef that puts the G above middle C on the second line of a staff	a clef that puts the G above middle C on the second line of a staff