| crust(noun, top, covering, scale, deposit) |
| degree(noun, stage, plane, echelon) |
| deposit(noun, verb, mass, pile, film) |
| foil(noun, cover, slip, piece, face) |
| grade(noun, verb, level, row, stage) |
| hierarchy |
| membrane(noun, slip, piece, covering, fold) |
| overspread(verb, cover, obscure, hide, protect) |
| patina(noun, covering, scale, deposit, varnish) |
| slice |
| stage(noun, level, row, plane, echelon) |
| strata |
| strip(noun, line, material, band, shred) |
| veil(noun, verb, cover, obscure, hide) |
| vein(noun, line, level, band, strip) |
| accretion(noun, mass, residue, sediment) |
| board up(verb, expression, phrasal verb, cover, obscure) |
| bush up(verb, expression, phrasal verb, cover, obscure) |
| canopy(verb, cover, obscure, hide, protect) |
| cap(verb, cover, obscure, hide, protect) |