Find Synonyms

inefficient Synonyms

Another word for inefficient

Choosing another word for inefficient that fits your sentence is easier when synonyms and similar words are paired with an exact adjective definition and ranked by match strength.
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• adjective (Context 1)

Not achieving maximum productivity; wasting or failing to make the best use of time, energy, or resources.

Usage Example

"The older heating system was replaced because it had become costly and wasteful."

Strongest
wasteful
Strong
unproductive
uneconomical
disorganized
incompetent
Weak
time-consuming

Opposites of inefficient

The opposite of inefficient shifts depending on context. Common opposites include:

efficient
productive
economical
streamlined
cost-effective
competent
See all opposites of inefficient

• Nearby Words

ineffectually
ineffectualness
inefficiency
inefficient
inefficiently
inelastic
inelegance

Cite this Entry

Wordmom. (2026). Synonyms for Inefficient. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/inefficient
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