fluid

Flighty is a related term of fluid.

As an adjective flighty

is given to unplanned and silly ideas or actions.

As a noun fluid is

fluid.

Impulsive is a related term of fluid.

As nouns the difference between impulsive and fluid

is that impulsive is that which impels or gives an impulse; an impelling agent while fluid is fluid.

As an adjective impulsive

is having the power of driving or impelling; giving an impulse; moving; impellent.

Impetuous is a related term of fluid.

As an adjective impetuous

is making arbitrary decisions, especially in an impulsive and forceful manner.

As a noun fluid is

fluid.

As a noun fluid is

fluid.

Fluid is a related term of spirited.

As a noun fluid

is fluid.

As a verb spirited is

(spirit).

As an adjective spirited is

lively, vigorous, animated or courageous.

Mercurial is a synonym of fluid.

As nouns the difference between mercurial and fluid

is that mercurial is (obsolete) any of the plants known as mercury while fluid is fluid.

As an adjective mercurial

is (often capitalized, see (mercurial)) pertaining to the planet mercury.

Variable is a related term of fluid.

As nouns the difference between variable and fluid

is that variable is variable while fluid is fluid.

Fickle is a related term of fluid.

As an adjective fickle

is quick to change one’s opinion or allegiance; insincere; not loyal or reliable.

As a verb fickle

is to deceive; flatter.

As a noun fluid is

fluid.

Unpredictable is a related term of fluid.

As nouns the difference between unpredictable and fluid

is that unpredictable is an unpredictable thing while fluid is fluid.

As an adjective unpredictable

is unable to be predicted.

Volatile is a related term of fluid.

As an adjective volatile

is (physics) evaporating or vaporizing readily under normal conditions.

As a noun fluid is

fluid.