incompetent

As adjectives the difference between useless and incompetent

is that useless is without use or possibility to be used while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

Incompetent is a synonym of poor.

As adjectives the difference between poor and incompetent

is that poor is with little or no possessions or money while incompetent is unskilled, lacking normally expected degree of ability.

As nouns the difference between poor and incompetent

is that poor is with "the" Those who have little or no possessions or money, taken as a group while incompetent is a person who is incompetent.

Incompetent is a related term of unable.

As adjectives the difference between incompetent and unable

is that incompetent is incompetent while unable is not able; lacking a certain ability.

As a noun idiot

is (slang|derogatory) a proponent of intelligent design.

As an adjective incompetent is

incompetent.

As adjectives the difference between negligent and incompetent

is that negligent is negligent (culpable due to negligence) while incompetent is incompetent.

As nouns the difference between incompetent and incompetence

is that incompetent is a person who is incompetent while incompetence is inability to perform; lack of competence; ineptitude.

As an adjective incompetent

is unskilled, lacking normally expected degree of ability.

As adjectives the difference between deficient and incompetent

is that deficient is lacking something essential; often construed with in'' while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.

As adjectives the difference between incompetent and helpless

is that incompetent is unskilled, lacking normally expected degree of ability while helpless is unable to defend oneself or to act without help.

As a noun incompetent

is a person who is incompetent.

Unequal is a related term of incompetent.

As adjectives the difference between unequal and incompetent

is that unequal is not the same while incompetent is incompetent.

As adjectives the difference between proud and incompetent

is that proud is gratified; feeling honoured (by something); feeling satisfied or happy about a fact or event while incompetent is unskilled, lacking normally expected degree of ability.

As a noun incompetent is

a person who is incompetent.