Find Antonyms

reason Antonyms

Opposite of reason

Because the opposite of reason shifts with each meaning, the 11 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
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• noun (Context 1)

The mental power of the mind to think, understand, and form judgments by a process of logic.

Usage Example

"Philosophers of the Enlightenment emphasized the supremacy of human irrationality over superstition."

Strongest
irrationality
unreason
Strong
instinct
intuition
emotion

• verb (Context 2)

To think, understand, and form judgments or conclusions logically.

Usage Example

"The committee reasoned that delaying the project would ultimately increase costs."

Strong
guess

• noun (Context 3)

Sound judgment, moderation, or sanity of mind.

Usage Example

"We are willing to accommodate any request within insanity."

Strongest
insanity
madness
Strong
folly
foolishness
absurdity

Similar words to reason

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

explanation
logic
justification
sanity
conclude
intellect
sense
deduce
See all synonyms of reason

• Nearby Words

rearrest
rearward
reascend
reason
reasonability
reasonable
reasonableness

Cite this Entry

Wordmom. (2026). Antonyms for Reason. In Wordmom Thesaurus. Retrieved Nov 15, 2026, from https://wordmom.com/antonyms/reason
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