F clef vs bass clef

F clef and bass clef both are nouns.

Word	Noun	Adjective	Verb	Adverb
F clef	Yes	No	No	No
bass clef	Yes	No	No	No

As nouns, F clef and bass clef are synonyms defined as:

F clef and bass clef: a clef that puts the F below middle C on the fourth line of a staff

F clef (noun)	bass clef (noun)
a clef that puts the F below middle C on the fourth line of a staff	a clef that puts the F below middle C on the fourth line of a staff