quality

adjective

1
an essential and distinguishing attribute of something or someone
the quality of mercy is not strained"--Shakespeare
2
a degree or grade of excellence or worth
the quality of students has risen
an executive of low caliber
3
(music) the distinctive property of a complex sound (a voice or noise or musical sound)
the timbre of her soprano was rich and lovely
the muffled tones of the broken bell summoned them to meet
4
a characteristic property that defines the apparent individual nature of something
each town has a quality all its own
the radical character of our demands
5
high social status
a man of quality

Also useful for “quality”:Scrabble— High-value letters — see what it scores