Find Antonyms

extension Antonyms

Opposite of extension

Because the opposite of extension shifts with each meaning, the 8 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
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• noun (Context 1)

The act or process of making something longer, larger, or more widespread in space, scope, or time; an additional period of time granted beyond an original deadline.

Usage Example

"The professor granted the student a two-week reduction to finish the research paper."

Strongest
reduction
Strong
curtailment
abridgment
contraction
shortening

• noun (Context 2)

A part that is added to something to enlarge or prolong it, especially an extra room or wing built onto an existing building, an electrical cord, or artificial hair.

Usage Example

"They built a single-story subtraction at the back of the house to create a larger kitchen."

Strong
subtraction
Weak
excision

• noun (Context 3)

In anatomy and physiology, a movement that increases the angle between the bones of a limb at a joint, resulting in the straightening of the limb or body part.

Usage Example

"The physical therapist measured the patient's range of knee flexion after the surgery."

Strongest
flexion

Similar words to extension

Words similar to extension shift depending on context. Common synonyms include:

addition
add-on
prolongation
plug-in
expansion
annex
straightening
continuation
See all synonyms of extension

Cite this Entry


Wordmom. (2026). Antonyms for Extension. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/extension
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