Sleep and Sleepiness

Sleep noun - A natural periodic loss of consciousness during which the body restores itself.

Sleepiness and sleep are semantically related. In some cases you can use "Sleepiness" instead a noun "Sleep".

Nearby Words: sleepy, sleeping, sleeper, sleepless, sleepiness

Sleepiness noun - The quality or state of desiring or needing sleep.

Sleep and sleepiness are semantically related. Sometimes you can use "Sleep" instead a noun "Sleepiness".

Nearby Words: sleep, sleepy, sleepily