Synonyms for irrational
- adjective
All synonyms
Adjective
Definitions
- adj. 1
Not rational; unfounded, nonsensical or wrong-headed.
Related words
- Word family
- irrationality irrationally
- Phrases
- irrational number
Choose the right word
Of these terms, irrational is the weakest, denoting that which is plainly inconsistent with the dictates of sound reason; as, an irrational course of life.
Webster's Revised Unabridged Dictionary (1913)
Example sentences
- absurd Do you really not see how absurd your question is?
- unreasonable You can't reason with someone who is unreasonable.
- illogical When you think of it, this fear of dying is illogical.
- silly Tom gets confused and says silly things sometimes.
- preposterous I've never heard such preposterous accusations!
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| irrational | rising | |
| absurd | steady | |
| unreasonable | falling | |
| illogical | steady | |
| silly | rising |
Use in printed books, per decade from 1850 to 2019.
By length
- 5 letters
- blind1, silly2, brute1
- 6 letters
- absurd2, unwise2, raving2
- 7 letters
- foolish2
- 8 letters
- mindless2
- 9 letters
- senseless2, illogical4, delirious4, insensate
- 10 letters
- cockamamie4, reasonless
- 11 letters
- extravagant4, nonsensical4, unreasoning3, injudicious4
- 12 letters
- unreasonable4, preposterous4
The small number after each word is its number of syllables (silly2 = 2 syllables).
In other languages
- Français
- irrationnel
- Italiano
- irrazionale
- Español
- irracional
- Deutsch
- irrational