drowsiness

As nouns the difference between vigilance and drowsiness

is that vigilance is alert watchfulness while drowsiness is state of being drowsy.

As an adjective awake

is not asleep; conscious.

As a verb awake

is (label) to become conscious after having slept.

As a noun drowsiness is

state of being drowsy.

Drowsiness is a related term of sloth.

As nouns the difference between drowsiness and sloth

is that drowsiness is state of being drowsy while sloth is (uncountable) laziness; slowness in the mindset; disinclination to action or labour.

As a verb sloth is

(obsolete|intransitive) to be idle.

As nouns the difference between doze and drowsiness

is that doze is (countable) a light, short sleep or nap while drowsiness is state of being drowsy.

As a verb doze

is to sleep lightly or briefly; to nap.

As nouns the difference between insomnia and drowsiness

is that insomnia is (label) while drowsiness is state of being drowsy.

As nouns the difference between dizziness and drowsiness

is that dizziness is the state of being dizzy; the sensation of instability while drowsiness is state of being drowsy.

As nouns the difference between drowsiness and silence

is that drowsiness is state of being drowsy while silence is the lack of any sound.

As a verb silence is

to make (someone or something) silent.

As an interjection silence is

a common imperative instructing the addressed to remain silent.

As a noun drowsiness

is state of being drowsy.

As an adjective malaise is

difficult, awkward.

Drowsiness is a related term of inertia.

As nouns the difference between drowsiness and inertia

is that drowsiness is state of being drowsy while inertia is (physics|uncountable|or|countable) the property of a body that resists any change to its uniform motion; equivalent to its mass.