1. (noun) a temporary state in which you are unable (or unwilling) to sleep

• sleeplessness

2. (noun) the process of paying close and continuous attention

• alertness
• vigilance
• watchfulness

1. (noun) a periodic state during which you are conscious and aware of the world

• arousal
• vigil

2. (noun) the process of paying close and continuous attention

• jealousy

1. (noun) a periodic state during which you are conscious and aware of the world

• physical condition
• physiological condition
• physiological state
• waking

2. (noun) a temporary state in which you are unable (or unwilling) to sleep

• temporary state

3. (noun) the process of paying close and continuous attention

• attention

1. (noun) a temporary state in which you are unable (or unwilling) to sleep

• insomniac
• sleepless
• watchful
• light
• wakeful

2. (noun) the process of paying close and continuous attention

• alert
• watchful
• alert
• alive
• awake
• argus-eyed
• argus-eyed
• open-eyed
• open-eyed
• vigilant
• vigilant
• wakeful
• wakeful

1. (noun) a temporary state in which you are unable (or unwilling) to sleep

• drowsiness
• sleepiness
• somnolence