Find Antonyms

constant Antonyms

Opposite of constant

Because the opposite of constant shifts with each meaning, the 18 antonyms and opposite words below are separated across 5 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Occurring continuously over a period of time without interruption or letup.

Usage Example

"The engine made a intermittent humming noise throughout the entire flight."

Strongest
intermittent
sporadic
Strong
occasional
infrequent
irregular
temporary

• adjective (Context 2)

Remaining the same over a period of time; unchanging or invariable in nature, value, or extent.

Usage Example

"The laboratory samples must be kept at a variable temperature to ensure accurate results."

Strongest
variable
fluctuating
Strong
unstable
erratic
inconsistent
changeable

• noun (Context 3)

A situation, quality, or state that does not change over time.

Usage Example

"Change is the only variable in the rapidly evolving technology sector."

Strongest
variable
Strong
uncertainty

• noun (Context 4)

A quantity or parameter in mathematics, physics, or computer programming that has a fixed, non-varying value.

Usage Example

"The speed of light in a vacuum is a fundamental physical variable."

Strongest
variable

• adjective (Context 5)

Steadfast, faithful, and dependable in affection, allegiance, or purpose.

Usage Example

"She remained a fickle friend through all his years of hardship."

Strongest
fickle
inconstant
unfaithful
disloyal
Strong
unreliable

Similar words to constant

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

steadfast
continuous
unchanging
continual
faithful
steady
uniform
loyal
See all synonyms of constant

Cite this Entry


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