sleeper

I'm a light sleeper: I get woken up by the smallest of sounds.

Therefore let penal laws, if they have been sleepers of long, or if they be grown unfit for the present time, be by wise judged confined in the execution […]

We are up against the pros; and pros who have been involved in this kind of activity for many years. […] The public apathy today is disturbing — few realize, Mr. Chairman, that there are sleepers in this country and we know that they are able to manipulate at will behind the scenes.

We spent a night on an uncomfortable sleeper between Athens and Vienna.

A box-office bomb when it first came out, the film was a sleeper, becoming much more popular decades after being released.

Aaron, Devin, and Laura looked so comfy in their sleepers.

At least a couple of weeks since I last slept, / Kept takin' sleepers, but now I keep myself pepped.