useless

As a noun whack

is a blow, impact or slap.

As a verb whack

is to hit, slap or strike.

As an adjective useless is

without use or possibility to be used.

As adjectives the difference between careless and useless

is that careless is (lb) free from care; unworried, without anxiety while useless is without use or possibility to be used.

As adjectives the difference between useless and void

is that useless is without use or possibility to be used while void is containing nothing; empty; vacant; not occupied; not filled.

As a noun void is

an empty space; a vacuum or void can be .

As a verb void is

(label) to make invalid or worthless.

As adjectives the difference between useless and uncertain

is that useless is without use or possibility to be used while uncertain is not certain; unsure.

As adjectives the difference between useless and invaluable

is that useless is without use or possibility to be used while invaluable is of great value; costly, precious, priceless.

As adjectives the difference between incapable and useless

is that incapable is not capable (of doing something); unable while useless is without use or possibility to be used.

As a noun incapable

is (dated) one who is morally or mentally weak or inefficient; an imbecile; a simpleton.

As adjectives the difference between powerless and useless

is that powerless is lacking sufficient power or strength while useless is without use or possibility to be used.

As a verb great

is .

As an adjective useless is

without use or possibility to be used.

As a noun nuisance

is a minor annoyance or inconvenience.

As an adjective useless is

without use or possibility to be used.

As adjectives the difference between inadequate and useless

is that inadequate is while useless is without use or possibility to be used.