Synonyms of the word

lacking

• v. present participle of lack.
• n. The absence of something; a lack.
• adj. Missing or not having enough of (a good quality, etc).

absent

• adj. (not comparable) Being away from a place; withdrawn from a place; not present; missing.
• adj. (not comparable) Not existing; lacking.
• adj. (sometimes comparable) Inattentive to what is passing; absent-minded; preoccupied.
• n. (obsolete) Absentee; a person who is away on occasion.
• prep. In the absence of; without.
• v. (reflexive) To keep (oneself) away.
• v. (transitive, archaic) To keep (someone) away.
• v. (intransitive, obsolete) Stay away; withdraw.
• v. (transitive, rare) Leave.

deficient

• adj. Lacking something essential; often construed with in.
• adj. Insufficient or inadequate in amount.
• adj. (mathematics) Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper…

inadequate

• adj. Not adequate; unequal to the purpose; insufficient; deficient.
• n. An individual who is inadequate.

missing

• v. present participle of miss.
• adj. Not able to be located; gone; absent; lost.
• adj. (of an internal combustion engine) Running roughly due to an occasional lack of a spark or other irregular…
• n. (statistics) A value that is missing.

nonexistent

• adj. Not existent; not real.

wanting

• adj. Absent or lacking.
• prep. without.
• v. present participle of want.
• n. The state of wanting something; desire.