Moroseness, n.
Sourness of temper; sulenness. Learn good humor, never to oppose without just reason; abate some degrees of pride and moroseness. I. Watts.
Note: Moroseness is not precisely peevishness or fretfulness, though often accompained with it. It denotes more of silence and severity, or ill-humor, than the irritability or irritation which characterizes peevishness.
Shades of meaning
Fernald has no entry of its own for moroseness; he lists it under acrimony.
He lists it without comment; the entries above explain its neighbors.