What do the following words have in common?

NOR
QUEST
RAGE
MINE
LACE
GOON
TAN
SAGE

HINTS:
1. It has to do with music.
2. Two letters can precede each word to make new words. The letters are different, except for the first and last words, in which the two preceding letters are the same.

Answer:

The words can be preceded, in order, by the notes of the musical scale,

DO RE MI FA SO LA TI DO:

DONOR
REQUEST
MIRAGE
FAMINE
SOLACE
LAGOON
TITAN
DOSAGE