An air-raid shelter, a structure designed to give protection against bombs.

An absence of debts or indictments. / (soccer) A game played without having conceded a goal. / Used other than figuratively or idiomatically: see clean, sheet.

Alternative form of hardshell

(idiomatic) To become more socially active or gregarious.

The shell of a tortoise, sometimes inaccurately the shell of a turtle, or that material. / Alternative form of tortoiseshell

A type of retaining wall used during construction by driving interlocking sheets of material into the ground. / The material used to assemble a sheet pile retaining wall.

relatively even erosion of a layer of soil without channel formation; generally takes place on sloping land

A sheet of paper on which a carbon copy is made.

Alternative form of tortoiseshell

Alternative form of tortoiseshell