1. (noun) lack of an adequate quantity or number

• deficiency
• insufficiency

2. (noun) a lack of competence

• insufficiency

3. (noun) unsatisfactoriness by virtue of being inadequate

• inadequateness

1. (noun) lack of an adequate quantity or number

• amount

2. (noun) a lack of competence

• failing
• weakness

3. (noun) unsatisfactoriness by virtue of being inadequate

• unsatisfactoriness

1. (noun) lack of an adequate quantity or number

• deficit
• shortage
• shortfall
• exiguity
• leanness
• meagerness
• meagreness
• poorness
• scantiness
• scantness
• scarceness
• scarcity
• slenderness

1. (noun) lack of an adequate quantity or number

• adequacy
• adequacy
• sufficiency
• sufficiency

2. (noun) unsatisfactoriness by virtue of being inadequate

• adequacy
• adequateness

1. (noun) lack of an adequate quantity or number

• deficient
• lacking
• wanting
• deficient
• deficient
• insufficient
• insufficient

2. (noun) unsatisfactoriness by virtue of being inadequate

• inadequate
• unequal
• inadequate
• poor
• short