Semblance, n.
Etymology: [F. See Semblable, a.]
1. Seeming; appearance; show; figure; form. Thier semblance kind, and mild their gestures were. Fairfax.
2. Likeness; resemblance, actual or apparent; similitude; as, the semblance of worth; semblance of virtue. Only semblances or imitations of shells. Woodward.
Shades of meaning
Fernald has no entry of its own for semblance; he lists it under analogy, appear, pretense.
He lists it without comment; the entries above explain its neighbors.