Synonyms for ill-founded

Most common

flimsy · baseless · unjustified · groundless · ill-grounded

All synonyms

Adjective

Antonyms

well-founded, well-grounded

All antonyms of ill-founded →

Definitions

1. adj. 1

   Unsubstantiated, not based on fact or evidence.

Example sentences

• flimsy The flimsy cordon failed to keep back the protestors.
• baseless You've got quite the talent for making baseless accusations.
• unjustified It's not unjustified, given the circumstances.
• groundless So far, your action seems completely groundless.

By length

6 letters

flimsy²

8 letters

baseless²

10 letters

groundless²

11 letters

unjustified⁴

The small number after each word is its number of syllables (flimsy² = 2 syllables).