Based on granites, new words formed by adding one letter at the beginning or end:
b - breasting c - recasting d - astringed e - gradients g - agentries h - gratinees i - reseating k - stingaree l - restaging m - ingathers n - grainiest o - seriating p - streaking r - gnarliest s - integrals t - reslating u - triangles v - emigrants w - mastering y - streaming
