sleeper

One that sleeps.

A sleeping car.

Children’s pajamas, usually with legs that cover the feet.

One that achieves unexpected recognition or success, as a racehorse or movie.

A spy or saboteur who is planted in an enemy country and who lives unobtrusively as a citizen of that country until activated into clandestine operations by a prearranged signal.

A horizontal structural member on or near the ground that supports weight.

A railroad crosstie.

Any of various chiefly tropical fishes of the family Eleotridae of fresh, brackish, and shallow marine waters, resembling the gobies but without fused pelvic fins and noted for their habit of lying immobile.

A stump of a tree cut off short and left In the ground.