Find Synonyms

irrationality Synonyms

Another word for irrationality

Choosing another word for irrationality depends on context, so the synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
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• noun (Context 1)

The quality or state of being illogical, unreasonable, or lacking sound judgment.

Usage Example

"Behavioral economists study how human unreasonableness influences financial decision-making during market panics."

Strongest
unreasonableness
illogicality
Strong
absurdity
folly
senselessness
foolishness
incoherence

• noun (Context 2)

An irrational belief, thought, action, or habit.

Usage Example

"The novel gently satirizes the everyday irrationalities and contradictions of modern bureaucratic life."

Strong
absurdity
folly
fallacy

• noun (Context 3)

In mathematics, the property of a real number whereby it cannot be expressed as the exact ratio of two integers.

Usage Example

"Ancient Greek mathematicians were famously troubled by the discovery of the incommensurability of the square root of two."

Strong
incommensurability

Opposites of irrationality

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

rationality
reason
logic
commensurability
reasonableness
sensibleness
common sense
sanity
See all opposites of irrationality

• Nearby Words

irony
irradiate
irrational
irrationality
irrationally
irrawaddy
irreconcilable

Cite this Entry

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