usefulness

As an adjective unuseful

is not useful; useless.

As a noun usefulness is

the quality of being useful, to which extent something is useful.

As a noun usefulness

is the quality of being useful, to which extent something is useful.

As an adjective important is

important.

As nouns the difference between usefulness and subservience

is that usefulness is the quality of being useful, to which extent something is useful while subservience is the state of being subservient.

As a noun usefulness

is the quality of being useful, to which extent something is useful.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between usefulness and function

is that usefulness is the quality of being useful, to which extent something is useful while function is what something does or is used for.

As a verb function is

to have a function.

As nouns the difference between usefulness and reliability

is that usefulness is the quality of being useful, to which extent something is useful while reliability is the quality of being reliable, dependable, or trustworthy.

As nouns the difference between kindness and usefulness

is that kindness is the state of being kind while usefulness is the quality of being useful, to which extent something is useful.

As a noun usefulness

is the quality of being useful, to which extent something is useful.

As an adjective elegant is

elegant.

As nouns the difference between usefulness and relevance

is that usefulness is the quality of being useful, to which extent something is useful while relevance is the property or state of being relevant or pertinent.

As nouns the difference between usefulness and utilization

is that usefulness is the quality of being useful, to which extent something is useful while utilization is an alternative spelling of lang=en.