Find Antonyms

illogical Antonyms

Opposite of illogical

Pinning down the opposite of illogical requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
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• adjective (Context 1)

Lacking sense, clear, or sound reasoning; contrary to the rules of logic.

Usage Example

"It is completely logical to assume that the project will succeed without proper funding and planning."

Strongest
logical
rational
reasonable
Strong
sensible
coherent
sound
valid
cogent

Similar words to illogical

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

irrational
unreasonable
fallacious
unsound
incoherent
invalid
absurd
senseless
See all synonyms of illogical

• Nearby Words

illiterately
illness
illogic
illogical
illogically
illuminate
illuminated

Cite this Entry

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