Synonyms of the word

failing

• v. present participle of fail.
• n. weakness; defect.
• prep. if the preferred or prior option is not possible.

failed

• v. simple past tense and past participle of fail.

failure

• n. State or condition of not meeting a desirable or intended objective, opposite of success.
• n. An object, person or endeavour in a state of failure or incapable of success.
• n. Termination of the ability of an item to perform its required function, breakdown.

flunk

• v. (US, transitive, intransitive) Of a student, to fail a class; to not pass.
• v. (US, transitive) Of a teacher, to deny a student a passing grade.
• v. (US, dated, informal) To shirk (a task or duty).
• v. To back out through fear.

imperfection

• n. (uncountable) Those qualities or features that are imperfect; the characteristic, state, or quality of…
• n. (countable) Something that makes something else less than perfect; a blemish, impurity, error, etc.

imperfectness

• n. The state of being imperfect.

unsatisfactory

• adj. inadequate, substandard or not satisfactory.

unsuccessful

• adj. Failed, not successful.

weakness

• n. (uncountable) The condition of being weak.
• n. (countable) An inadequate quality; fault.
• n. (countable) A special fondness or desire.