sleeper

As a noun sleeper

is someone who sleeps or sleeper can be (rail transport|british) a railroad tie.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As nouns the difference between sleeper and sill

is that sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie while sill is (architecture) (also window sill ) a horizontal slat which forms the base of a window or sill can be (uk) a young herring or sill can be the shaft or thill of a carriage.

As nouns the difference between couchettes and sleeper

is that couchettes is while sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie.

As a noun sleeper

is someone who sleeps or sleeper can be (rail transport|british) a railroad tie.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between flipflop and sleeper

is that flipflop is while sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie.

As a verb flipflop

is .

In nautical|lang=en terms the difference between pillow and sleeper

is that pillow is (nautical) a block under the inner end of a bowsprit while sleeper is (nautical) the lowest, or bottom, tier of casks.

As nouns the difference between pillow and sleeper

is that pillow is a soft cushion used to support the head in bed while sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie.

As a verb pillow

is to rest as on a pillow.

As nouns the difference between sleeper and couchette

is that sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie while couchette is a compartment on a passenger train having berths for sleeping.

As nouns the difference between sleeper and sleepers

is that sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie while sleepers is .

As nouns the difference between sleeper and sandals

is that sleeper is someone who sleeps or sleeper can be (rail transport|british) a railroad tie while sandals is .

As nouns the difference between sleeper and slipper

is that sleeper is someone who sleeps while slipper is a low soft shoe that can be slipped on and off easily.

As an adjective slipper is

slippery.

As a verb slipper is

to repeatedly strike the buttocks with a plimsoll as corporal punishment.