inertia

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.

As nouns the difference between ennui and inertia

is that ennui is a gripping listlessness or melancholia caused by boredom; depression while inertia is (physics|uncountable|or|countable) the property of a body that resists any change to its uniform motion; equivalent to its mass.

Inertia is a synonym of lethargy.

As nouns the difference between lethargy and inertia

is that lethargy is a condition characterized by extreme fatigue or drowsiness, or prolonged sleep patterns while inertia is the property of a body that resists any change to its uniform motion; equivalent to its mass.

Inertia is a related term of torpidity.

As nouns the difference between inertia and torpidity

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

As nouns the difference between inertia and torpor

is that inertia is the property of a body that resists any change to its uniform motion; equivalent to its mass while torpor is being inactive or stuporous.

Lassitude is a related term of inertia.

As nouns the difference between lassitude and inertia

is that lassitude is lethargy or lack of energy; fatigue while inertia is (physics|uncountable|or|countable) the property of a body that resists any change to its uniform motion; equivalent to its mass.

As nouns the difference between inertia and indolence

is that inertia is the property of a body that resists any change to its uniform motion; equivalent to its mass while indolence is habitual laziness or sloth.

As a noun inertia is

(physics|uncountable|or|countable) the property of a body that resists any change to its uniform motion; equivalent to its mass.

Sluggishness is a related term of inertia.

As nouns the difference between sluggishness and inertia

is that sluggishness is the property of being sluggish, unable or unwilling to act quickly while inertia is (physics|uncountable|or|countable) the property of a body that resists any change to its uniform motion; equivalent to its mass.

As nouns the difference between impetus and inertia

is that impetus is something that impels, a stimulating factor while inertia is the property of a body that resists any change to its uniform motion; equivalent to its mass.